How to Fit LED Lighting to Your Car Legally
How to Fit LED Lighting to Your Car Legally
You install LED lighting within your house - so why not your car? Here are the most common questions on the topic of LED lights for cars, fielded by GEM’s Technical Department:
1. New cars are fitted with LED lamps, why can I not install LED bulbs in my car’s exterior lamps to improve the looks and illumination?
LED lamps, fitted to new cars, have been tested and pass EU Whole Vehicle Type Approval. This means that the lenses and light sources work together to optimise driver visibility and reduce dazzle to oncoming traffic.
So, are LED headlights legal in the UK? They are, because these new car LED lamp units pass European / UNECE technical standards. This is the same with other lamps, including those fitted to the side and rear.
Nonetheless, the ‘bulbs’ on those newer cars thus equipped, at the time of writing, cannot be renewed. If an LED light source fails, the whole lamp has to be replaced.
You may have noticed LED replacement bulbs on the market. These are designed to be fitted into halogen lamps that accept filament bulbs. Unlike replacement, road-legal filament bulbs, LED conversion bulbs fail to comply with the aforementioned European technical standards for many reasons, so they cannot be e-marked.
Fitting them ensures that your lamp will not perform as designed and will prejudice the Whole Vehicle Type Approval of your vehicle, making it unroadworthy. This is why sellers tend to state that their LED bulbs are sold for off-road use only.
2. My car has passed its MoT Test with an LED bulb fitted, surely this makes them safe and legal?
The MoT is a minimum safety standard that does not permit dismantling to be carried out during the examination. Therefore, it is possible to have an unroadworthy car that has just passed its MoT Test.
Notably, the MoT Testing manual states:
Existing halogen headlamp units on vehicles... must not be converted to be used with high-intensity discharge (HID) or light emitting diode (LED) bulbs. If such a conversion has been done, you must fail the headlamp for light source and lamp not compatible.
This does not refer to complete replacement headlamp units which may be constructed with HID or LED light sources.
3. I fitted LED conversion bulbs to my car. As the lamp output is far brighter, surely it is safer than the old halogen bulb?
A lamp is not made safer just by being brighter. As halogen lamp optics are not designed to work with an LED bulb, some parts of the output pattern will be brighter and other parts will be dimmer.
The other issue involves light scatter, which can dazzle oncoming motorists. Regardless of these technical issues, however, it remains an offence to use LED conversion bulbs within an exterior lamp on the road for modern vehicles.
4. Are there any instances in which I can use an LED conversion bulb?
You can use an LED conversion bulb in an interior lamp, provided that the light emitted is not focussed on the road.
5. I wish to incorporate LED lighting into my car’s exterior. How can I do this legally?
The only way is to use a complete lamp unit that has been tested and wears a Type Approval Mark from an approved manufacturer.
However, GEM has come across complete LED lamps that do not wear any form of Type Approval Mark and such kits admit in the very fine print on the packaging that they are not for road use. Buy with care.
Any modification, however, must be declared to your insurance company.
6. I drive a classic car and the headlights are very dim, compared to modern vehicles. Is there an exception for classic vehicles? Due to its age, my car does not have to comply with Type Approval.
Since Brexit, the DVSA and the MoT permit LED conversion bulbs to be used in halogen exterior lamps but only on vehicles used on, or before, 1st April, 1986.
7. I have seen '501 LED bulb - road legal' and 'H7 LED Headlight bulb - Road legal UK' being advertised online - should I fit them?
We are aware of some sellers being keen to state that their wares are road legal, when they are not. While some bulb manufacturers insist that the legislation has not yet caught up with technology, the case remains (at the time of writing) that no road legal LED bulbs are on the market for modern vehicles.
Read our related blogs:
Did you know? GEM membership includes our exclusive quarterly motoring magazine, Good Motoring, which is delivered directly to our members' doors four times a year. If you enjoy motoring magazines, you're sure to find Good Motoring an excellent read every quarter.
Request your free sample copy of Good Motoring magazine by emailing firstname.lastname@example.org, providing your full postal address.
By requesting a free copy of Good Motoring, you consent to us using your postal address for this purpose. Your details will not be kept on file thereafter.
Keep up to date with the latest news from GEM Motoring Assist at:
GEM Motoring Assist is a members’ motoring and road safety organisation in the UK. Our aim is to keep our members on the move… whether that’s through our breakdown recovery service or our motoring and road safety expertise.
Join GEM for simple and straightforward, all-inclusive personal breakdown cover.
- Breakdown cover
- Car Maintenance
- Caravans & Campervans
- Classic Car Ownership
- Driver Wellbeing
- Driving Tips & Advice
- Electric Vehicles
- General Motoring
- Road Safety
- Summer driving
- Useful Resources
- Winter driving
- Time to clean up or pay up… with GEM’s grime-busting road safety tips
- How to look after superchargers
- Check your car for flat tyres this Pancake Day
- What are superchargers?
- How Overdosing DPF Additives Can Harm Your Engine
- 2023/2024 MOT Test consultation results announced
- Top reasons why your car won't start
- How to defrost a car windscreen – step-by-step guide
- What are glow plugs?
SIMPLE & STRAIGHTFORWARD
5-STAR RATED BREAKDOWN COVER FROM ONLY £78.50 per year