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Are LED Number Plate Lights Legal in the UK?

Conditional

LED number plate lights are legal in the UK if they show white light, illuminate the plate properly and are not a coloured or dazzling beam pointing backwards. Cheap blue-tinted or overly bright LED units are what fail.

Why?

The rear number plate has to be lit so it can be read at night, and the lamp that does it must show white light. Swapping the standard bulbs for white LED units is fine in principle and is a common tidy-up.

The problems come from novelty units. A plate light with a blue or coloured tint is not the required white and is not compliant. One that throws a visible white beam rearwards, rather than simply washing the plate, breaks the rule against showing white to the rear and can dazzle following drivers. Excessively bright "iceberg" LEDs often do both.

At the MOT the plate lamp must work and actually illuminate the plate. So a correctly coloured, properly aimed white LED that lights the plate without glaring backwards is road-legal; a blue, coloured or dazzling one is not.

What decides if it's legal

  • The rear number plate lamp must show white light and light up the plate.
  • It must not shine a visible white beam backwards or dazzle.
  • Blue-tinted or coloured plate lights are not compliant.
  • The lamp must work and illuminate the plate for the MOT.

Does it depend on your car?

The white-light and no-dazzle requirements are identical across cars. It is the LED unit itself that passes or fails, not the vehicle it is fitted to.

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Sources

This page is general guidance, not legal advice, on the rules in the UK for LED number plate lights. The detail varies by exact vehicle and changes over time - confirm with your insurer and the latest DVSA and GOV.UK guidance before modifying.