You've just bought a pendant light, a plug-in wall sconce or a pack of vintage filament bulbs — and now you're wondering: does this need a transformer before it'll work? It's a fair question, especially if you've seen "LED transformer" or "LED driver" mentioned elsewhere on lighting sites. Here's the short answer, and exactly when you do (and don't) need one.
Quick answer: If your pendant light, wall light or table lamp uses a standard E27 or E14 bulb, it runs on normal UK mains voltage (230V) and does not need a transformer — you just wire it in or plug it in. Transformers (also called LED drivers) are only needed for low-voltage systems, like LED strip lighting, LED tape, or certain low-voltage garden and display lighting.
Key Takeaways
- Standard E27/E14 pendant lights, wall lights and table lamps are mains voltage — no transformer required.
- A transformer (LED driver) converts mains AC to low-voltage DC, and it's only needed for low-voltage products like LED strips or LED tape.
- Plug-in wall lights need nothing extra at all — they go straight into a standard socket.
- Hardwired fixtures need to be connected by a qualified electrician, but still don't need a transformer if they take standard bulbs.
- LED filament bulbs (E27/E14) fit straight into your existing fixture — no separate driver needed for a single bulb.
- You'll only need a transformer from us if you're adding low-voltage LED strip or tape lighting alongside your fixtures.
Mains Voltage vs Low Voltage: What's the Difference?
Every light you buy runs on one of two systems, and it matters for what else you need to buy:
- Mains voltage (230V): Plugs or wires straight into your home's electricity supply. Most pendant lights, wall lights, table lamps and ceiling fittings — including everything in our Pendant Lights and Wall Light collections — fall into this category.
- Low voltage (12V/24V): Needs a transformer to step mains power down to a safe, steady low voltage. This applies to LED strip lighting, LED tape, and some outdoor or display lighting.
If you're only after a fixture-style light with a bulb — not a strip or tape system — you're almost certainly in mains voltage territory, and that means no transformer.
Do E27 or E14 Pendant Lights Need a Transformer?
No. Any pendant light with a standard E27 or E14 lamp holder is a mains voltage fitting. Once it's wired to your ceiling rose (or plugged in, for plug-in styles), you just screw in a bulb and switch on. There's no driver, transformer or converter box involved anywhere in the setup.
Adjustable Industrial Pendant Light, Metal Dome Shade, E27
£22.99
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5-Way Spider Hanging Pendant Light
£78.79
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Industrial Semi Flush Mount Ceiling Light
£13.35
Shop NowDoes a Wall Light Need a Transformer?
Same answer here — wall lights that take an E27 or E14 bulb are mains voltage, so no transformer is needed. This includes both hardwired sconces and our plug-in styles, which are genuinely the simplest option if you want a new wall light without calling an electrician: fit it to the wall, plug it into a nearby socket, and you're done.
Dimmable Plug-In Wall Light, Wooden Shelf & Rotary Switch
£14.39
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Vintage Water Pipe Wall Sconce | Steampunk Style
£19.99
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Plug-In Wall Light, Wood & Metal Cage, Black
£14.39
Shop NowNot sure whether your wall light is plug-in or needs hardwiring? Our Product Installation Guide covers exactly how each fixture type connects, room by room.
What About Table Lamps and Flush Ceiling Lights?
Same rule again — table lamps plug into a standard socket and use an E27 or E14 bulb, and flush or semi-flush ceiling lights are wired the same way as a pendant. None of these need a transformer either. Browse the full range in Table Lamps.
When Would You Actually Need a Transformer or LED Driver?
You only need to think about a transformer if you're adding a genuinely low-voltage product to your setup, such as:
- LED strip lighting or LED tape, e.g. under a shelf, along a plinth, or behind a headboard
- Certain outdoor or garden lighting runs
- Multiple low-voltage fittings wired together on one circuit
If that's what you're planning, matching the transformer's voltage and wattage to your setup matters — we've covered that in detail in our separate guide: LED Power Supply Transformer – 2026 Guide. For the fixtures on this page, though, you can skip straight to checkout.
IP45 Outdoor LED Power Supply Transformer, 400W 12V DC
£19.77
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DCVOLTAGE IP20 36–50W Constant Current LED Driver
£6.39
Shop NowSee the full LED Power Supply & Driver range →
Do LED Filament Bulbs Need Anything Special?
No — a single E27 or E14 LED filament bulb fits straight into an existing mains-voltage fixture, just like an old-style incandescent bulb did. No driver, no transformer, no extra wiring. If the bulb is dimmable, just make sure your existing switch or dimmer is LED-compatible.
Dimmable Vintage Filament Light Bulb, E27
£5.49
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12-Piece Vintage E27 LED Filament Bulbs, Amber Glass
£31.91
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Dimmable E14 LED Filament Bulb, C35 Candle 4W
£4.39
Shop NowBrowse the full LED Bulb collection →
Quick Checklist Before You Buy
- Check the bulb fitting on your new light — E27 or E14 means mains voltage, no transformer needed.
- If it's a plug-in fixture, you just need a nearby socket.
- If it's hardwired, arrange a qualified electrician for the connection — no transformer required either way.
- Only shop the Transformers collection if you're also installing LED strip, tape or a low-voltage system.
- Replacing old wiring or cabling on a vintage fixture? See our Vintage Cable range.
Frequently Asked Questions
Do pendant lights need a transformer?
No, standard E27 or E14 pendant lights run on mains voltage and connect directly to your home's electricity supply. A transformer is only needed for low-voltage products like LED strip lighting.
Does a wall light need a transformer?
No. Wall lights with a standard bulb fitting, whether plug-in or hardwired, are mains voltage and work without a transformer or driver.
Do LED bulbs need a transformer to work in a normal fixture?
No, a single LED bulb with an E27 or E14 fitting works in any mains-voltage light fixture without any extra transformer or driver.
What lighting products actually need a transformer?
Low-voltage products need a transformer, most commonly LED strip lighting or LED tape, and some outdoor or garden lighting systems. Standard bulb-based fixtures do not.
Can I fit a plug-in wall light without an electrician?
Yes, plug-in wall lights are designed to be fitted to the wall and then plugged into a standard socket, so no electrician or transformer is needed.
Browse mains-voltage pendant lights, wall lights and bulbs that are ready to fit — no transformer required.
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