Frequently asked questions

For dimmable LED lighting choose a V-Pro dimmer: our flagship range, designed for modern LED lighting, with push on/off switching and rotary dimming. The V-Pro family also includes:

• V-Pro Multiway: a dimming knob at 2 or 3 switch positions;
• V-Pro Smart: control from your phone, Alexa or Google Home;
• V-Pro Multi-Point: tactile touch at any number of switch positions, with infrared remote control at the master;
• V-Pro Micro: hidden behind retractive (push) switches.

If your LED lights or driver need leading-edge (triac) control, or you have more than 300W of LED on one dimmer, choose V-Com.

Always choose lamps that are described as dimmable. Not sure? Answer a few questions in our dimmer chooser.

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Add up the wattage of all the lamps the dimmer controls: the number of lamps times the watts printed on each. The total must not be more than the maximum load per gang on the dimmer's label and data sheet. For example, 8 LED downlights of 5W each add up to 40W.

PowerGrid grid dimmers also have a maximum per plate: single plate (1 to 2 gang) 400W, twin (3 to 4 gang) 800W, double twin (6 to 8 gang) 1200W, triple twin (9 to 12 gang) 1800W, and no more than 800W per row.

With low voltage lighting, add up the VA ratings of the transformers, not the wattage of the bulbs: see transformers and dimmer load. For lamp-by-lamp advice see our compatibility guides.

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V-Pro, V-Pro Multiway, V-Pro Smart and V-Pro Multi-Point dimmers have no minimum load, so they can dim a single LED lamp.

Most V-Com and V-Dim dimmers have a minimum: it is the first figure of the rating on the label, for example 20-400W. The 0-100W V-Com has none, and V-Dim dimmers work best with at least 100W. Below the minimum the lights may flicker: see flicker caused by too little load.

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• Triac or leading edge: choose V-Com, designed for LED lighting that needs leading-edge (triac) control. V-Pro dimmers are not suitable for triac dimmable drivers.
• Trailing edge: choose a V-Pro dimmer.
• 1-10V: choose an F-Series 1-10V dimmer.

If you are unsure which control your lamps need, check the lamp or driver manufacturer's data sheet, or ask us for advice: send us a message or email help@varilight.co.uk.

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Both. Each V-Pro dimmer has three terminals, C, L1 and L2, and works on 1-way circuits (one switch) and 2-way circuits (two switches, e.g. top and bottom of the stairs). V-Com dimmers are the same.

On a 2-way circuit replace only one of the switches with the dimmer: you dim from that switch, and the other switch turns the lights on and off. See how to wire it. To dim from every switch, see dimming from more than one switch.

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Yes. Choose by how you want to dim:

• A dimming knob at every switch (2 or 3 positions): one V-Pro Multiway dimmer with one or two companion controllers. 2-way and 3-way kits are available (MJKIT2W, MJKIT3W).
• Phone or voice, plus knobs at up to 3 positions: one V-Pro Smart dimmer with one or two V-Pro Multiway companion controllers.
• Touch at any number of positions: one V-Pro Multi-Point master dimmer with as many supplementary controllers as you need, up to 50m of cable. Infrared remote control works at the master only.
• Push (retractive) switches at any number of positions: a V-Pro Micro in-line dimmer pack.

Ordinary switches can't be used as the other positions with these systems: V-Pro Multiway and V-Pro Smart need companion controllers, and V-Pro Multi-Point needs Multi-Point supplementary controllers. If dimming from one switch is enough, a V-Pro dimmer works with an ordinary 2-way switch.

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VARILIGHT dimmers are not designed to handle mixed lighting types on a single circuit. This includes combining halogen and LED lamps. With halogen lamps being phased out, most installations now use only dimmable LEDs, which ensures optimal performance and reduces the risk of overload.

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Our dimmers are designed for wide compatibility and are tested with many lamp types, including Megaman and Philips, which have performed well in testing. However, due to constant changes in LED technology and driver designs, we cannot guarantee compatibility with all lamps.

Before purchasing, please check our compatibility guide and the dimmer selection guide to make sure the lighting load you have is compatible with the dimmer you have chosen.

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While halogen and incandescent bulbs have been largely phased out in the UK and EU, some dimmers are still compatible for legacy installations. V-Plus dimmers are recommended for halogen, including low voltage halogen on VARILIGHT transformers: their soft start reduces lamp failures at switch-on. V-Dim dimmers also suit mains halogen and incandescent lamps. V-Pro, V-Com and V-Pro Multi-Point dimmers can also be used with mains halogen and incandescent lamps, up to their LED maximum load.

For most modern installations we recommend LED lighting with our LED dimmers, which are optimised for LED lighting. We do not recommend V-Dim dimmers for dimmable LEDs, even if de-rated as some manufacturers suggest.

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Only a push on/off V-Dim dimmer. Rotary on/off dimmers are only suitable for 1-way circuits.

On a 2-way circuit (the same lights controlled by two switches), choose a push on/off dimmer and replace only one of the switches with it. You can only use one push on/off dimmer in a 2-way circuit, and it must be used with a normal switch. When you switch on a push on/off dimmer the lights come on at the level they were at before they were last switched off.

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Infrared remote control is available on the V-Pro Multi-Point Remote master dimmer (the master only, not the supplementary controllers). IR remotes such as the YRC8 can be used within 10 metres line of sight. The dimmer is preset to buttons 1 and 8 on the VARILIGHT YRC8 handset, and can learn a spare button on most infrared remote controls: see pairing a remote.

For smart control, we recommend the V-Pro Smart range, which works through an app and by voice.

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All the versatility of V-Pro LED dimming with smart features added:

• dim your lights with your phone, Alexa or Google Home, at home or away, using the free Supla app;
• scheduling, group control and scene setting;
• control from up to 3 positions with companion controllers;
• no hub and no neutral required: it replaces your existing switch or dimmer.

See the V-Pro Smart page and the V-Pro Smart dimming features (PDF). V-Pro Smart Wi-Fi sockets are also available.

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The V-Pro Smart dimmer controls up to 120W of dimmable LED lighting, with no minimum load. It is also suitable for quality dimmable electronic low voltage transformers.

It is not suitable for non-dimmable LED, fluorescent lamps or tubes, wire-wound or toroidal transformers, electric motors (e.g. fans) or triac dimmable drivers (use V-Com dimmers instead).

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Add up the VA ratings of the transformers, not the wattage of the bulbs. Choose transformers with a rating close to their lamp load, e.g. a 50VA, 60VA or 70VA transformer for a 50W low voltage bulb.

• VARILIGHT transformers: any number, as long as you keep within the maximum rating of the dimmer. For YT40DC12 and YT40DC24 LED drivers, never more than 250W per dimmer circuit.
• Other brands: use only fully dimmable electronic transformers, and no more than 5 per dimmer circuit.
• V-Plus dimmers (recommended for halogen on VARILIGHT transformers): load to 75% of the dimmer's maximum.
• Transformer specifies triac dimming: use a V-Com dimmer.

Wire-wound or toroidal transformers are not suitable for V-Pro, V-Pro Multiway, V-Pro Multi-Point, V-Pro Smart or V-Dim dimmers. If your transformer does not say that it is dimmable it is unlikely to work with any dimmer.

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• 12V a.c. LED lamps (e.g. MR16): use a VARILIGHT YT50LZ transformer up to 25W, or YT70LZ up to 35W. Our transformers take a.c. LED lighting at half their full rating.
• 12V d.c. LED: use the YT40DC12 driver, up to 40W of LED strip or 30W of LED lamps.
• 24V d.c. LED: use the YT40DC24 driver, up to 40W of LED strip or 30W of LED lamps.

The dimmer goes on the mains (input) side of the transformer or driver. For LED strip choose a V-Pro dimmer, with no more than 250W of drivers per dimmer circuit. See dimmable transformers and the 12V and 24V driver instructions (PDFs).

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Yes. Our replacement dimmer modules fit into most existing VARILIGHT dimmer plates. Remove the knob (and the front plate, on a Screwless product), unscrew the nut, take the old module out from the back and fit the new one.

Modules come in different sizes, so check which sizes your faceplate takes: see replacement modules and the Matrix page. Module instructions (PDFs): MJP120, MJP300, MKP100.

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Matrix lets you build the dimmer you need. A Matrix dimmer pack (faceplate kit) includes a faceplate, knob(s), the clear plastic nut(s) and a nut spinner: add the dimmer modules you want, for example a V-Pro and a V-Com module on the same plate. Many dimmers that aren't made ready-built in a finish can be made this way.

Use the configurator on the Matrix page to choose a faceplate and modules, or type a dimmer's product code into the search box: its data sheet lists the Matrix parts you need. The Matrix kit instructions (PDF) give the maximum total wattage for each plate.

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The V-Pro Micro (MDJ160) is a small in-line dimmer that hides behind a light switch or ceiling rose. It is controlled by retractive (momentary) switches, the type that spring back after they are pressed: a short press turns the lights on or off, a long press dims them up or down. It dims up to 160W of dimmable LED and remembers your last brightness.

For more switch positions, wire more retractive switches in parallel: only one Micro pack is needed per lighting circuit, and every switch can dim. It does not need a neutral at the switch. For separate up and down buttons, choose the MDJ160K with a centre-off retractive switch. Driving mode, minimum and maximum brightness, Boost, child lock and reset are all set from the switch: see set up your dimmer.

See the plain English guide and the MDJ160 and MDJ160K instructions (PDFs).

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V-Pro dimmers have three modes: Mode 1 trailing edge (the default, best for most LEDs), Mode 2 simulated leading edge, not triac (certain LEDs) and Mode 3 alternative trailing edge (some LEDs). On V-Com dimmers Mode 1 is recommended; if you notice any flashing, try Mode 2 or, in some cases, Mode 3.

1. Set the knob to maximum (MKP100 module: a high brightness level). Switch the lights off and on once per second, 3 times (6 presses of the knob in all), to enter configuration mode.
2. For Mode 2: turn the knob fully anticlockwise and wait 2 seconds.
   For Mode 3: turn it fully anticlockwise, then fully clockwise, and wait 2 seconds.
3. The lights flash to confirm: once for Mode 1, twice for Mode 2, three times for Mode 3.

To go back to Mode 1, reset the dimmer to factory settings. If Mode 2 draws too much current, the dimmer goes back to Mode 1 by itself.

These steps are for current dimmers. Older dimmers may be programmed differently: check the software version on the side of the module and use the matching leaflet from the instruction leaflets or earlier leaflets page. There is a programming video on VARILIGHT TV, and the steps for every range are in set up your dimmer.

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If your lights flicker at low brightness, raise the minimum. If they are too bright at the lowest setting, lower it.

1. Turn the dimmer to a low brightness level (MJP120 and MJP300 modules: fully anticlockwise).
2. Switch the lights off and on once per second, 3 times.
3. The lights "step" up and down to confirm you are in configuration mode.
4. Turn the knob fully clockwise to begin the adjustment.
5. Slowly turn the knob down and up until you find your preferred minimum brightness.
6. Leave the knob in this position: after 5 seconds the setting saves automatically.

Make sure all the lamps stay visibly on at the lowest setting (UK EcoDesign Regulation 1194/2012). Can't get into configuration mode? Child lock may be on. Other ranges: set up your dimmer.

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If the lights flicker at high brightness, lower the maximum. If they aren't bright enough, you can raise it.

1. Set the dimmer to maximum (fully clockwise).
2. Switch the lights on and off once per second.
3. Set the knob to minimum, then switch on and off again.
4. Return the knob to maximum and switch the lights on.
5. In configuration mode, turn the knob fully anticlockwise to begin the adjustment.
6. Slowly turn the knob until you find your preferred maximum brightness.
7. Leave it for 5 seconds to save.

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Child lock stops the dimmer going into programming mode by accident. If you can't get the dimmer to program, turn child lock off first. On V-Pro and V-Com dimmers:

1. Set the knob to maximum and switch on and off twice.
2. Set the knob to minimum and switch on and off twice.
3. Set the knob to maximum and switch on, off, on.
4. The lights step to confirm the lock is on.

Repeat the same steps to turn it off. V-Pro Multiway: see Multiway programming. Watch the child lock video on VARILIGHT TV.

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Yes. Always turn off the mains power before replacing bulbs controlled by a dimmer. If you have changed the type of bulb, reset the dimmer to its factory settings: V-Pro and V-Com, V-Pro Multiway, V-Pro Multi-Point, V-Pro Smart, or any range in set up your dimmer.

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A reset restores Mode 1 and the original brightness settings.

1. Set the knob to maximum and switch off and on 3 times, about once per second.
2. Wait at least 3 seconds, then switch off and on 3 times again.
3. The lights fade off: the reset is complete.

If the dimmer won't respond, child lock may be on. Resetting another range: set up your dimmer.

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Drive gives LEDs that won't switch on at low brightness a short boost at start-up. On V-Pro and V-Com dimmers:

1. Set the knob to minimum.
2. Switch the lights on and off once per second.
3. Set the knob to maximum, and switch on and off again.
4. Set the knob to minimum and switch the lights on.
5. In configuration mode, turn the knob up until the lamps switch on.
6. Leave it for 5 seconds to save.

To turn Drive off, repeat the steps but skip step 5. The same feature is called Boost on V-Pro Multiway, in the V-Pro Smart app and on the V-Pro Micro, where it is set from the switch: see set up your dimmer.

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Settings are changed with the knob on the dimmer (not a companion controller). "Hold" means press and hold the knob.

• Minimum brightness: set to minimum and hold for 6 seconds. The lights come on so you can adjust the minimum. Leave the dimmer for 3 seconds; the lights flash to show the new level is set.
• Maximum brightness: set to maximum and hold for 6 seconds. When the lights blink, turn the knob to adjust. Leave it for 3 seconds; the lights flash to confirm.
• Dimming mode: turn the dimmer off, then hold for 6 seconds. The lights pulse and go off. Press once for mode 1, twice for mode 2 or three times for mode 3 (mode 1 is the default).
• Boost (for LEDs that don't light at low brightness): turn the dimmer off, then hold for 12 seconds, ignoring the blink at 6 seconds. The lights come on so you can set the boost level.
• Child lock: set to minimum and hold for 12 seconds, ignoring the blink at 6 seconds. On: the lights come on for 2 seconds and go off. Off: the lights flash twice and go off.
• Factory reset: set to maximum and hold for 12 seconds, ignoring the blink at 6 seconds. The lights come on and fade to off.

If the dimmer won't program, turn child lock off first. Full instructions: V-Pro Multiway leaflet (PDF), or pick the setting in set up your dimmer.

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These settings are made on the master dimmer only, not from a supplementary controller. [Up] is the upper part of the touch pad and [Down] the lower part.

• Dimming mode: press and hold [Up] until the lights reach maximum, then keep holding for 6 seconds. The lights go off, then flash 1, 2 or 3 times to show the current mode. Press [Up] 1, 2 or 3 times to choose mode 1, 2 or 3, then wait a few seconds: the lights flash 1, 2 or 3 times to show the new mode.
• Minimum brightness: press and hold [Down] until the lights reach minimum, then keep holding for 6 seconds. The lights come on at the brightest possible minimum and show the 8 available settings. Step through them with [Up] and [Down]. When you are happy, stop pressing for at least 4 seconds: the lights go off, step up and down, then come on at the new minimum.

Mode 1 (trailing edge) is the default and suits most lighting; some LEDs perform best in leading-edge mode. Full instructions: touch master and remote master leaflets (PDFs), and set up your dimmer.

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Multi-Point Remote master dimmers are preset to respond to buttons 1 and 8 on the VARILIGHT YRC8 handset. To use a different button, or a spare button on most other infrared remotes:

1. Press [Up] on the master dimmer 6 times, roughly once per second. The lights step up and down and switch off: the dimmer is in programming mode.
2. Within 15 seconds, from less than 1 metre away and pointing directly at the dimmer's button, briefly press the chosen button on the handset. The lights turn on and off.
3. To confirm your choice, briefly press the same button again. If programming has worked, the lights turn on and off, then step up and down once.

Try the dimmer with the remote. If it doesn't respond, start again at step 1. If the problem persists, try a different button, a different remote control or the dedicated VARILIGHT YRC8 handset. Certain brands of transformer (used with low voltage lighting) can prevent programming: for best results choose VARILIGHT transformers.

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• Fit 2 x AA batteries (not included): slide open the back cover in the direction of the arrow.
• The handset can operate up to 7 dimmers independently. Dimmers are preset to buttons 1 and 8; you can teach each dimmer a different button from 2 to 7.
• Button 8 is the master button: it turns all the lights on or off, and the dimmers remember the level they were at.
• A short press turns the lights on or off. Hold the button to dim; release and press again to change direction.

The handset is optional: the dimmers can also learn a spare button on most infrared remote controls. See the handset instructions (PDF).

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1. On the master dimmer (this is not possible from a supplementary controller), press [Up] 6 times, about once per second, until the lights step up and down.
2. Press [Up] 6 more times.
3. The dimmer fades to off to show it has been reset to factory settings, then comes back on.

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Before you start, download the free Supla app and create an account.

1. Fit the dimmer, restore the power and check the knob dims the lights.
2. Hold the dimmer knob down for 5 seconds to enter pairing mode: the blue indicator light flashes quickly.
3. In the Supla app, tap the 3-bar menu, choose "Add I/O Device" and follow the instructions on screen. You choose your Wi-Fi network and set a password for the dimmer.
4. When the dimmer is connected, the blue light goes off (you can turn it on in the dimmer's settings). If it flashes slowly, the Wi-Fi connection has been lost.
5. Test the dimmer at the faceplate and in the app.

Watch the set-up videos for Android and Apple devices, or see the V-Pro Smart instructions (PDF). For help with the Supla app or creating an account, please contact Supla: Supla FAQs, Supla forum.

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The V-Pro Smart dimmer works with both Amazon Alexa and Google Home. Pair it with the Supla app first.

Google Home: open the Google Home app and its settings, open "Works with Google", search for Supla and choose SUPLA.ORG. Sign in to the Supla website: your account is linked automatically. Choose the device and set it up.

Amazon Alexa: open the Alexa app and tap More, tap the search icon (top right) and "Skills & Games", search for Supla, choose SUPLA and enable the skill. Sign in to the Supla website and grant access to link your account, then tap "Discover Devices" so Alexa finds your dimmer.

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In the Supla app: select the dimmer and tap the cog at the top right. From there you can perform a factory reset, switch between driving modes 1, 2 and 3, turn Boost on or off (for lights that don't come on at minimum brightness), set the minimum and maximum of the operating range with the dark grey squares on the wheel, and set how the status light behaves.

Reset without the app: leave the dimmer untouched, out of pairing mode, for at least 5 seconds first (if the light is flashing quickly it is in pairing mode: press the knob briefly, then wait 5 seconds).

1. Press and hold the knob for more than 5 seconds: the dimmer enters pairing mode.
2. Release, then within 3 seconds press again and keep holding.
3. At about 5 seconds the lamps step up and down once. Release here to erase the stored Wi-Fi network and device password (credentials reset).
4. Or keep holding: at about 10 seconds the lamps step up and down again. Release here to reset all the dimming settings (mode, Boost, operating range and status light), keeping your Wi-Fi details.

Every V-Pro Smart setting, step by step: set up your dimmer.

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Yes. The dimmer uses secure WPA2/WPA3 networks. We recommend setting strong passwords for your home Wi-Fi and your Supla account.

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Local rotary control still works. Remote control and voice features will be unavailable until the internet is restored. See also my V-Pro Smart dimmer has gone offline.

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Switch off at the mains first. If in doubt, consult a qualified electrician.

1. Replace only one of the two switches with the dimmer (fitting two dimmers causes flicker). Note the position of each wire on the old switch, and keep any wires that were grouped together in one terminal together.
2. The wire(s) from the common terminal of the old switch go into C.
3. The other two wires go into L1 and L2, either way round.
4. For metal faceplates, connect the earth wire to the marked earthing terminal.
5. Fit the dimmer into the wall box without overtightening, check no wires are trapped behind it, restore the power and test.

1-way circuit (one switch): one wire into C, the other into L1 (either way round); L2 is not used.

More than one dimmer on the plate: treat each set of three terminals as a separate dimmer. If the old switch had terminals linked between gangs, link the same terminals on the dimmer with a short wire.

Diagrams are in the V-Pro instructions (PDF), and there is a V-Pro video on VARILIGHT TV. V-Com dimmers are wired the same way: see the V-Com instructions (PDF).

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• Dim from one switch: a push on/off V-Pro or V-Com dimmer replaces one of the switches and the others stay as they are: see the 3-way (intermediate) switch and dimmer diagram on our wiring diagrams page. For a matching look, use MPINT intermediate and MH0 2-way push on/off modules (dummy dimmers) at the other switches.
• Dim from all three: V-Pro Multiway or V-Pro Smart with two companion controllers.
• Dim from more than three: V-Pro Multi-Point (any number of supplementary controllers) or V-Pro Micro (any number of retractive switches).

See dimming from more than one switch.

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• Use one Multi-Point master dimmer with any number of Multi-Point supplementary controllers. It is not possible to use a conventional switch in the same circuit.
• The total cable length from the master to the last supplementary controller should be no more than 50m.
• Link each supplementary controller to the master with three (or two) wires, terminal to matching terminal: LOAD, S-LINK and (optional) LIVE.
• The supply live and the lamps connect at the master. If the supply live arrives at a supplementary controller instead, the LIVE link from it to the master is required.
• On 2, 3 or 4-gang dimmers, treat each group of terminals as a separate dimmer. You may need a short length of wire to link the LIVE terminals if only one live wire is present.

Supplementary controllers are touch control only: the remote control works on the master. See the diagrams in the touch master, remote master and supplementary controller instructions (PDFs) and the touch dimmer diagrams on our wiring diagrams page.

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• Use one V-Pro Multiway dimmer (or one V-Pro Smart dimmer) with up to two V-Pro Multiway companion controllers, for rotary dimming at each position.
• The companion controllers replace the other switches. Link them to the dimmer at the S and Live terminals; their third terminal takes the neutral or, where there is no neutral, a link to the dimmer's load terminal.
• Never connect neutral to the main dimmer.
• Standard or retractive switches are not compatible: only use V-Pro Multiway companion controllers.
• The total cable length from the dimmer to the furthest companion controller must not exceed 50m.

The V-Pro Multiway instructions (PDF) have 1-way, 2-way and 3-way diagrams, and the companion controller instructions (PDF) show the wiring with and without a neutral.

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Yes. Use one V-Pro Smart dimmer with up to two V-Pro Multiway companion controllers (for example JQS1W, or the MJS module). The companion controllers are not Wi-Fi themselves: they give push on/off and rotary dimming at the other switches, and the app controls the whole circuit.

Standard or retractive switches are not compatible: only use V-Pro Multiway companion controllers. The total cable length from the dimmer to the furthest companion controller must not exceed 50m. The diagrams are in the V-Pro Smart instructions (PDF).

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• V-Pro Smart and V-Pro Multiway dimmers: no. They install in place of a standard switch, and neutral must never be connected to the dimmer itself.
• V-Pro and V-Com rotary dimmers: no. They connect to the switch wires only (terminals C, L1 and L2).
• V-Pro Multiway companion controllers: they can be wired with or without a neutral (see the companion controller instructions, PDF).
• V-Pro Micro: no neutral is needed at the switch. Follow the leaflet: it warns not to connect the neutral to the main dimmer unit.

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PowerGrid: 35mm for dimmers, 25mm for rockers and fuses. V-Pro Multi-Point grid dimmers depend on the faceplate: 25mm with a Classic faceplate, 35mm with a Screwless faceplate. Cooker panels and shaver sockets need deeper boxes: see wall box depths for every range. The depth for a particular product is also on its data sheet: type the product code into the search box.

Single dimmer plates fit wall boxes with 60.3mm fixing centres, double plates 120.6mm. A box with four fixing lugs needs the top and bottom lugs broken off or bent flat. 3 and 4-gang dimmers come on a wider twin plate, so check your wall box.

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The instruction leaflet, with its wiring diagrams, comes with your product. You can also find every current leaflet on the instruction leaflets page, and leaflets for older and discontinued products on the earlier leaflets page. Where relevant, check the software version and choose the correct leaflet: the software version is on the side of the dimmer module.

We also have a page of wiring diagrams and how-to videos. Every data sheet links to the product's leaflet: type the product code into the search box. If the wiring diagram is not enough, please contact a qualified electrician.

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Dimmers from all of our ranges should be disconnected for the duration of the insulation resistance test. Failing to do so could damage the dimmer and make the product guarantee invalid.

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The wiring accessories instructions (PDF) have diagrams for 1-way, 2-way (two common forms of wiring, either may be used), intermediate and double pole switches. Install to the current IET Wiring Regulations; if in doubt, consult a qualified electrician.

• Switch off the mains supply and remove the fuse or switch off the circuit breaker first.
• The layout of the terminals may differ between fittings, so check the terminal markings carefully.
• For 2 or more gangs, the live wire may be connected to each COM terminal with a short length of sleeved wire.
• If the product has an earth terminal, connect the earth wire to it, then a short length of wire from that terminal to the earth terminal on the wall box, sheathed in green and yellow sleeving.

See also our wiring diagrams.

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1. Place the product face down on a soft surface. Insert a screwdriver tip into one of the short slots and twist a quarter turn to release the decorative front plate. Lift out the switch assembly.
2. Make sure the wall around the wall box is flat, sanding away any uneven material if necessary.
3. Connect the wires, including the earth wire to the earth terminal on the metal back plate.
4. Fix the switch assembly to the wall box with the screws provided. Tighten evenly and gradually, and do not overtighten: this deforms the plastic clips and stops the front plate seating correctly.
5. Press the front plate firmly into place, with gentle pressure on each side until the clips engage.

Watch the Screwless video on VARILIGHT TV.

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When installing this product in a back box with too much cabling, the best option is to apply even pressure to the whole faceplate front to allow the plate to sit flush, then tighten the screws adequately. However, don't use too much force, as this could damage the product or the back box, or make the wiring unsafe. If you have to use too much force to get the faceplate to sit flush, consider reducing the amount of cabling in the back box.

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We have a video on our VARILIGHT TV YouTube channel showing how to install PowerGrid.

The PowerGrid items fit together using a front plate, a frame and a combination of modules. In order to fit them together, follow the instructions below. If in doubt, consult a qualified electrician.

1. Always disconnect the mains before beginning any electrical work.
2. Clip the grid modules into the grid frame: dimmers from the rear, switches and fuses from the front.

   PowerGrid dimmers are inserted from the rear. Insert the claws at the top of the dimmer module first and connect to the top of the frame. Push the module up from below and clip the base to the bottom of the frame. It will now hold securely in the plate. Remove any knobs from the dimmer modules before attaching the plate.

   Other PowerGrid modules are inserted from the front. First, slot the base of the module into the bottom of the frame. Next, push at the top of the module and it will click into place.

3. Make the electrical connections, making sure any bare wires are covered by appropriate sleeving. You can view wiring diagrams in the wiring accessories instructions (PDF) and each grid dimmer's own leaflet.
4. The grid frames must be earthed using the earth terminals provided.
5. Screw the grid frames to the wall box using the larger fixing screws supplied with the frames.
6. Attach the PowerGrid faceplate using the smaller fixing screws provided in a bag with the frames.
7. Switch on the mains supply.

For the PowerGrid Screwless range, follow the same instructions, but at step 6 you just need to clip the faceplate onto the frame.

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Yes. Our MultiGrid dimmer modules come in white or black with 8 different fascias, for MK, Schneider Ultimate, Schneider Lisse, Crabtree, Hager, Deta, BG and VARILIGHT PowerGrid grid systems. We also offer grid dimmer adaptor packs for each of these makes: they convert any PowerGrid dimmer module for use with that brand's grid.

Product codes for VARILIGHT grid dimmers always begin with a G (e.g. GJP100W for the V-Pro grid dimmer in white). See grid dimmers for the adaptor pack codes.

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• Always turn off the electricity supply at the mains first. We recommend that transformers are fitted by a qualified electrician.
• Dimmer switches go on the primary (input) side of the transformer.
• Install in a well-ventilated place, away from heat sources, and keep at least 30cm between the transformer and the bulb, or another transformer.
• Do not connect the output cables of one transformer to those of another.
• Connect bulbs to the transformer in parallel, never in series, and use identical cable lengths on the output side for even light levels.

Full details and distances are in the transformer instructions (PDF).

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Although VARILIGHT transformers have a single output, additional sets of terminals are provided on higher-rated transformers so that you can make several terminations to make full use of the rating.

If you have more than two output terminals on your transformer you can use as many pairs as you need. The terminals are paired from the centre outwards: the middle two terminals are a pair, the outer terminals are a pair, and so on.

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VARILIGHT products are widely available from retailers and wholesalers in the UK and elsewhere in Europe:

• online retailers;
• local stockists: search by postcode, including shops with a VARILIGHT display;
• trade customers: electrical wholesalers;
• outside the UK: our international distributors.

Every data sheet shows where to buy that product: look it up by code on the data sheets page. See where to buy.

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Buy through your electrical wholesaler: VARILIGHT products are offered by many wholesalers. Find a wholesaler near you, or contact our UK trade sales team on 01293 223333 or mail@varilight.co.uk.

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VARILIGHT is a manufacturer and does not sell directly to end users, so we are unable to provide pricing information.

For pricing and availability, please contact one of our authorised stockists or online retailers.

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Browse every range and finish in the online catalogue. A VARILIGHT swatch book of finishes is also available: product code YSWATCH (its data sheet shows where to buy).

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Yes. If you need something special, unusual or bespoke for your project, please contact your VARILIGHT supplier with a description of what you need: for example a twin fused spur on a twin plate, or a number of intermediate switches.

Our engraving service can label switches with a permanent engraving to show their function, such as "Hot Tap" or "Coffee Machine". Some engraved switches are standard products: see the PowerGrid page. More on bespoke products.

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We are unable to process Stearn Electric orders directly through Customer Services. For all enquiries relating to Stearn orders, please contact our sales division, Systems M'Arena:

Email: sysma@varilight.co.uk
Tel: 01293 851563

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Look the product up by code on the data sheets page. The data sheet says if a product is made to order or no longer available, and shows where to buy current products. Many dimmers that aren't made ready-built in a finish can be made with our Matrix system. For a discontinued product, see what happens if my product is obsolete.

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Ordered from www.varilightdirect.co.uk? Please contact VARILIGHT Direct:

• Phone: 01293 905800
• Email: sales@varilightdirect.co.uk
• Monday to Friday, 9:00am to 4:00pm (excluding bank holidays)

Ordered from our B&Q marketplace or Amazon stores? We may be able to help: please send us a message or email help@varilight.co.uk. For returns, it's best to contact B&Q or Amazon first.

Ordered from another shop or wholesaler? Please contact them.

Trade customers with a question about an order placed with us can email our trade sales team at mail@varilight.co.uk. Stearn Electric orders: see ordering through Stearn Electric.

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View the product finishes. You can click on any of the finishes to get a list of part codes with links to data sheets.

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If you know the product code, enter it on the data sheets page (or in the search box at the top of any page) to go straight to its data sheet. Otherwise search by range, finish or product type, or browse a range and narrow it down.

If you know the finish you want, you can also choose it in the online catalogue to see the full range listing, with a link to each product's data sheet. Data sheets show the back box depth, the instruction leaflet and where to buy.

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Open the product's data sheet (enter the product code on the data sheets page) and choose "Declaration of Conformity": it opens a printable declaration for that product. Products with smart features also link to their statement of compliance with the UK connectable product security regulations.

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All our knobs have the same fixing, so they fit every VARILIGHT dimmer. Screwless products need a "pipped" knob, which is slightly raised for spacing. Pipped knobs aren't sold separately: for a replacement, please send us a message or email help@varilight.co.uk and our customer services team will help.

Spare knobs are sold singly or in packs of 10 (the same code with 10 on the end). Click a code for its data sheet, which shows where to buy it:

• WKAL Aluminium
• WKBK Black
• WKSS Brushed Steel
• WKIR Iridium
• WKMB Matt Black
• WKBR Polished Brass
• WKCH Polished Chrome
• WKCU Polished Copper
• WKSN Satin
• WKWH White

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Yes: extra length 50mm screws in packs of 20, in brass (YSB50X20), iridium (YSI50X20) and chrome (YSN50X20).

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The PowerGrid range has the same profile as the Dimension Screwless range and is designed to coordinate with it. The difference between the two ranges is that PowerGrid plates have two small screws in the front to attach the frame (yoke) and the front plate. You can view more examples on the PowerGrid page.

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Decorative products should be treated with great care when cleaning. Excessive scrubbing or the application of abrasive cleaning products may permanently damage the quality of the finish.

We recommend cleaning with a damp soft cloth. The application of detergents is not recommended. Dilute any detergents you do intend to use and always wipe away with a damp cloth to remove any traces of detergent before allowing the product to air dry.

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Do not use masking tape on any decorative products. The adhesive may chemically bond with the surface finish.

For Screwless products we recommend removing the faceplate and taking care not to paint over the plastic clips, as this may prevent the faceplate from clipping back on.

For products with visible fixing screws we recommend turning off the mains power, removing the fixing screws and pulling the product gently away from the wall, taking care that the wires remain fully fixed into their terminals.

When the product is clear of the wall, cover it with a plastic bag and use an elastic band to secure it behind the product. You can then paint or wallpaper the wall.

Please note that it can take several weeks for the chemicals in paint or wallpaper paste to become inert. Before this time there is a danger that they will react with the product if it has a metal faceplate. For this reason we recommend using a plastic bag as a temporary gasket between the product and the wall once it is dry to the touch. In other words, use the plastic to form a barrier between the product and the surface of the wall.

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Yes. Our European VariGrid range mixes switches and sockets on the same faceplate, and the European fixed range has a screwless faceplate with a fixed assortment of switches and sockets. Both are designed to fit European circular wall boxes, with sockets to CEE 7/4 (German "Schuko", Type F) and CEE 7/5 (French, Type E).

See the European fitting instructions (PDF) and the European sockets video. Outside the UK, our international distributors can tell you where to buy.

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Please send us a message or email help@varilight.co.uk, telling us the product code and what is missing or broken, and we will sort it out.

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Some colour variation is unavoidable on decorative products. Materials are purchased in batches and there may be some minor differences in the finish from batch to batch. At VARILIGHT we aim to keep these differences to an absolute minimum.

Please note that some finishes are more prone to colour variation than others due to the nature of the production process; for example the Iridium Black finish is intrinsically more variable than our Pewter Effect finish.

In most cases any differences will not be noticeable even if the products are mounted side by side.

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This problem can occur if the fixing screws are over-tightened when installing the base unit to the wall. Loosen your fixing screws and try again.

Please make sure screws are tightened just enough to hold the unit in place and no more. Over-tightening can distort the base unit and prevent the clips from engaging correctly with the faceplate. We suggest locating the unit by pushing it flush with gentle hand pressure and then tightening the screws gently.

You may need replacement components if you think you have permanently distorted your base unit by over-tightening. In this case please send us a message or email help@varilight.co.uk.

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Cu29 raw copper is designed to tarnish: a natural patina develops without regular cleaning. To brighten it, wipe lightly with a little citric acid on a polishing cloth, and never coat it.

On other finishes, tarnishing is usually caused by damp. The source of the damp may be a damp wall. In this case you can prevent further tarnishing by placing a plastic barrier between the product and the wall (for example a piece cut from a clear plastic bag).

If the surface of the product has been damaged, for example during cleaning, then damp may have permeated and caused tarnishing of the faceplate. Unfortunately in this case the product is permanently damaged.

If you have recently decorated, please note that it can take several weeks for the chemicals in paint or wallpaper paste to become inert. Before this time there is a danger that they will react with the product if it has a metal faceplate. For this reason we recommend using a plastic bag as a temporary gasket between the product and the wall once it is dry to the touch.

If your products are permanently damaged it may be that you can claim on your house insurance for replacement products.

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VARILIGHT products are covered by a lifetime guarantee against faults arising from defective materials or workmanship. "Lifetime" means the expected service life of the product while you own it. The guarantee is for the original purchaser, with proof of purchase.

We will repair or replace faulty units, provided that:

• the unit has been installed correctly, used only with compatible loads, and not overloaded or run on an incorrect power supply;
• the dimmer module has not been tampered with (faulty modules from multi-gang units may be removed for servicing without affecting the others).

It does not cover normal wear and tear, accidental damage or misuse, consequential loss or damage, installation costs, or problems caused by incompatibility between lamps and the dimmer. It does not affect your statutory rights.

The lifetime guarantee covers every VARILIGHT product. See our lifetime guarantee.

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Many problems can be solved without a replacement, so please check the troubleshooting answers first. Then:

1. Submit a guarantee claim, or email our support team at help@varilight.co.uk, with your purchase details and a description of the problem. We'll review it and respond within one working day.
2. Tell us the product code, the batch number (on the plastic moulding at the back of a dimmer), the type and wattage of the lamps it controls, and the fault. Keep your proof of purchase.
3. The faulty product must be returned to us. We'll email you a reference number, and you can return the product free of charge through the Royal Mail returns portal, using our returns reference (KILNWOOD) and your reference number.

If the claim is approved, we'll arrange a repair or replacement at no cost to you. See our lifetime guarantee.

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The batch number is printed on the plastic moulding at the back of the dimmer module: on the side or the bottom, depending on the model. The leaflet has a space to record it, and it helps us give you the right technical support. Where it applies, the software version is on the side of the dimmer module: use it to choose the right instruction leaflet.

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All advice is provided in good faith based on the information available at the time. Varilight (Doyle & Tratt Products Ltd) does not accept liability for consequential loss, damage, or installation costs resulting from advice given. It remains the installer's responsibility to ensure product suitability and compatibility for the intended application.

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If a product range is discontinued, we may not be able to supply exact replacements. Where possible, we will offer a complimentary upgrade to a current equivalent model under the terms of the product guarantee. Please contact Customer Services (send us a message or email help@varilight.co.uk).

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Yes. It is perfectly in order to remove a faulty dimmer module from a multi-gang dimmer by pulling off the knob and unscrewing the nut under the knob (and removing the front plate first, on a Screwless product). You will then still have the remaining modules working while we service the faulty one. See how to make a claim.

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The V-Pro IR range is now obsolete and no longer manufactured. Please contact Customer Services (send us a message or email help@varilight.co.uk), telling us the product code and batch number of your dimmer. The current touch and remote control range is V-Pro Multi-Point.

Before you claim, it is worth trying the simple checks in my dimmer has stopped working: a reset at the circuit breaker, and checking the load. V-Pro IR dimmers are wired, paired and reset differently from Multi-Point: use the V-Pro IR instructions (PDF). Instructions for V-Plus IR and Eclique dimmers are on the earlier leaflets page. (V-Pro Multi-Point was formerly called Eclique 2.)

For other discontinued products, see what happens if my product is obsolete.

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Many faults can be cleared without replacing anything. Switch off at the mains before touching any wiring and, if in doubt, consult a qualified electrician.

1. Reset the power. Switch the lighting circuit off at the circuit breaker, then back on after a few seconds. An overloaded dimmer switches itself off to protect itself, and touch and remote dimmers can often be reset this way.
2. Check the load. Add up the wattage of all the lamps on the dimmer (for low voltage lighting, the VA ratings of the transformers). It must not be more than the maximum per gang on the dimmer's label. See how many lamps a dimmer can take.
3. Changed the bulbs? If you have changed the type of lamp, reset the dimmer to its factory settings: V-Pro and V-Com, V-Pro Multiway, V-Pro Multi-Point, V-Pro Smart, or V-Pro Micro in set up your dimmer.
4. New installation? Check the wiring against the diagram in the instruction leaflet. A touch or remote dimmer must have a true live connected to its "Live" terminal: it must not be switching neutral.
5. Lights come on but won't dim? See my dimmer won't dim the lights.

If it still doesn't work, the dimmer may be faulty. It is covered by our lifetime guarantee: see how to make a claim. It helps to have the product code, the batch number (printed on the plastic moulding at the back of the dimmer) and the type and wattage of your lamps to hand.

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V-Pro and V-Com dimmers: we would advise you to perform the factory reset on the dimmer switch. Instructions are also in the product instruction leaflet and on VARILIGHT TV. If you have performed the factory reset and the lights are still not dimming, please contact Customer Services: send us a message or email help@varilight.co.uk.

Other dimmers: this problem is usually caused when one of the components in the dimmer has failed, usually due to a plasma. Plasmas can be caused when a mains halogen light bulb (e.g. GU10) fails. For this reason we recommend only using good quality mains halogen bulbs from well-known brands. If a dimmer shows this fault it will need to be replaced.

The best type of dimmer to use with mains halogen bulbs is a VARILIGHT V-Plus series dimmer. The rapid on-board overload protection can usually turn the dimmer off so quickly that it survives a spike in the mains supply.

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The usual reason is that the dimmer is overloaded. A V-Plus dimmer turns the brightness down, or off, until the overload is removed and it is switched off and on again. V-Pro, V-Com, V-Pro Multi-Point and V-Dim safety dimmers switch off instead until the overload is removed.

Check the maximum load on the label on the back of the dimmer. Add up the wattage of the lamps it controls; with low voltage lighting, add up the VA ratings of the transformers, not the bulbs. If the total is more than the maximum, use fewer or lower-wattage lamps, or a higher-rated dimmer: see how many lamps a dimmer can take.

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This problem can sometimes be solved by resetting the dimmer by turning it off and on again at the circuit breaker. If that doesn't help, work through my dimmer has stopped working.

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1. If this is a new installation then this problem is usually caused by incorrect wiring. Please consult a qualified electrician and ask them to check that the dimmer is not switching neutral. There must be a true live connected to the "Live" terminal. The wiring diagrams are in the instruction leaflet.
2. If the dimmer has been working correctly then this fault has probably been caused by a component failure and the unit will need to be replaced: see how to make a guarantee claim.

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Most flicker can be cured with the dimmer's own settings. On V-Pro and V-Com dimmers:

• Flicker at low brightness: raise the minimum brightness.
• Flicker at high brightness: lower the maximum brightness.
• Flashing at any level: change the dimming mode. Mode 1 suits most LEDs; some perform better in Mode 2 or, in some cases, Mode 3.

Also check that:

• the lamps are described as dimmable, and are all of the same type: our dimmers are not designed for mixed lighting types on one circuit;
• on a 2-way circuit, only one of the switches has been replaced with a dimmer, to avoid flicker;
• if your dimmer has a minimum load (the first figure of the rating on most V-Com and V-Dim dimmers), the lamps add up to more than it: see flicker caused by too little load.

V-Pro Multi-Point, V-Pro Multiway and V-Pro Smart dimmers have the same kind of settings: see setting up and programming.

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This problem is usually caused when the dimmer is under-loaded.

Check the label on the back of the dimmer, where the minimum and maximum load are printed. Add up the ratings of all the light bulbs the dimmer controls and make sure they are more than the minimum. V-Dim dimmers work best with at least 100W. The 0-100W V-Com has no minimum.

If your lighting load is below the minimum, choose a different dimmer or use bulbs with a higher rating: you can still dim them right down. For dimmable LEDs choose a V-Pro dimmer: V-Pro dimmers have no minimum load.

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• Too bright at the lowest setting: reduce the dimmer's minimum brightness.
• Off or flickering at the lowest setting: raise the minimum brightness. If some LEDs won't switch on at low brightness, turn on Drive (Boost), which gives them a short boost at start-up.

When the dimmer is installed, all the lamps must stay visibly on at the lowest brightness setting (UK EcoDesign Regulation 1194/2012). How low a lamp will dim varies according to the brand and type of LED: see our compatibility guide.

The same settings on other dimmers: V-Pro Multiway, V-Pro Multi-Point, V-Pro Smart (in the app). V-Pro Micro is set from the switch: see set up your dimmer.

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It is quite normal for a dimmer switch to buzz a little. A dimmer is more prone to buzz with certain types of lighting load. If your lighting load is causing your dimmer to buzz excessively, we recommend changing the dimmer for a trailing-edge dimmer. Our V-Pro series trailing-edge dimmers are the quietest running dimmers available.

If the LED lamps themselves buzz while a V-Pro dimmer is on, a component within the lamps is vibrating during operation. Changing the driving mode on the dimmer may improve this. If the lamps continue to buzz after trying the different driving modes, we recommend contacting the LED manufacturer for further advice.

With other brands of dimmable electronic transformer, noise levels may vary depending on the type and quantity of transformers used.

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All touch and remote dimmers draw a tiny standby current, much like a television, so that they are ready to respond. Some LED lamps are sensitive enough to glow on this current: check your LED lamps are suitable for use with dimmers that have a standby mode.

Our LEDFix load regulator (part number YAGF, previously called GlowFix) solves this: one LEDFix connected in parallel with any of the lamp fittings stops sensitive LED lights from glowing or flickering. It draws less than 1 watt. See the LEDFix instructions (PDF) and the LEDFix wiring diagram. Another solution would be to use a V-Pro push on/off rotary dimmer.

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This happens when the dimmer detects too much current draw from the lamps on start-up, so it charges the lamps in steps in order to protect itself. Changing the driving mode on the dimmer may improve this behaviour. Instructions are also in the product instruction leaflet and on VARILIGHT TV.

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The V-Pro soft-start function gradually increases power over approximately 1 second to protect against inrush current and improve lamp life. LED drivers vary widely in design, so some may start differently or take longer to reach full brightness.

Changing the driving mode on the dimmer may improve this behaviour, although results cannot be guaranteed due to lamp variability.

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When the dimmer enters programming mode there is a small amount of current that passes through the module to allow the dimmer to be reconfigured. Some LED lamps are extremely sensitive and will glow even though the dimmer is effectively off. You should still be able to complete the programming procedure. If you are not certain, change one of the LED lamps for an ordinary halogen or filament lamp just for the duration of the programming, as this should stop the LED lamps glowing when they should be off.

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All IR devices briefly process signals when a command is detected. This happens in microseconds and is normally unnoticeable. However, some LED drivers are extremely sensitive to small current changes, which may cause a brief flicker.

This is a characteristic of the lamp and driver combination and not something that can be fully controlled by the dimmer.

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Yes. It is normal for dimmer switches to feel slightly warm during operation, particularly when they are controlling loads close to their maximum rated capacity. During dimming a small amount of heat is generated, and it is intentionally transferred to the front plate through the dimmer module's heat sink. This helps dissipate heat efficiently and protects the internal electronic components.

Touch and remote dimmers also draw a very small standby current when switched off, so they may feel slightly warm even when off. They have over-temperature protection, and the fire retardant material around the electronics at the back may show some discolouration from moderate temperatures, which is expected in normal operation.

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Some LED lamps can interfere with the operation of supplementary controllers. All settings are made at the master dimmer.

1. Check each supplementary controller is linked to the master at its LOAD and S-LINK terminals, and that the master has a live on its LIVE terminal: see wiring Multi-Point.
2. Restore the factory settings at the master.
3. Try a different dimming mode, or a higher minimum brightness.
4. Check your LED lamps are suitable for use with dimmers that have a standby mode: a LEDFix load regulator may be required.

If this does not cure the problem, please send us a message or email help@varilight.co.uk.

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1. Try replacing the batteries in the handset (the YRC8 takes 2 x AA).
2. Use the remote on the master dimmer: remote control is only possible for the master unit, not the supplementary controllers. Dimmers are preset to respond to buttons 1 and 8 on the VARILIGHT YRC8 handset.
3. Reset the dimmer to its factory settings, then program it to the remote control again. If you are using dimmable LED lamps, it may help to change the driving mode to mode 2 before programming the dimmer to the remote.
4. Certain brands of transformer (used with low voltage lighting) can prevent programming. For best performance of any VARILIGHT dimmer with low voltage lighting, choose VARILIGHT transformers.

VARILIGHT remote control dimmers work with most other infrared handsets. If the problem persists, try a different button, a different remote control or the dedicated VARILIGHT YRC8 handset.

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This problem usually occurs when the dimmer is switching neutral rather than switching live. Please check your wiring against the diagram in the relevant instruction leaflet.

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• Blue light flashing quickly: the dimmer is in pairing mode. Pair it in the Supla app, or press the knob briefly to return to normal operation.
• Blue light flashing slowly: the dimmer has lost its Wi-Fi connection.

If you have changed your Wi-Fi network or password, erase the stored network (a "credentials reset", see reset without the app) and pair the dimmer again.

The knob on the dimmer still works while it is offline. For help with the Supla app or your Supla account, please contact Supla: Supla FAQs and Supla forum.

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Switch off at the mains before removing the plate, and if in doubt consult a qualified electrician. Check the wiring against the wiring accessories instructions (PDF): all terminals must be securely tightened, including those tightened at the factory, and no bare wire should stick out of a terminal.

If the product itself is faulty, it is covered by our lifetime guarantee: see how to make a claim.

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Every VARILIGHT USB charging product has Smart Port technology, which detects the connected device and sets the output for the fastest charging speed. How fast a device charges depends on the type of port and how many devices share it:

* Power Delivery 3.0 on the USB-C ports only. For laptops, use a USB-C port with Power Delivery. If a port doesn't charge at all, please send us a message or email help@varilight.co.uk: the socket is covered by our lifetime guarantee.

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If lights on a VARILIGHT transformer turn off unexpectedly, the transformer is most likely overloaded. Reduce the load by using fewer bulbs or bulbs with a lower rating: the total wattage of the bulbs on a transformer must not be more than its rating, or half its rating for a.c. LED lamps (e.g. YT50LZ up to 25W).

VARILIGHT transformers have auto-resetting overload protection (above 200% of the nominal load), auto-resetting over-temperature protection (above 100°C) and short circuit protection. Install them in a well-ventilated place, away from heat sources: see the transformer instructions (PDF).

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