However, today’s cars have such bright and sometimes dazzling headlights, there is less need to focus on the driver. It means lighting can instead be designed around pedestrians and cyclists.

Halogen bulbs are the cheapest, though more expensive replacements that claim to be brighter, more powerful and able to illuminate more of the road are available. Some of these claims are true ...

One of the newest bulbs on the market, it arrives with a bold claim of being 150 per cent brighter than standard ... Inside where Britain's favourite track car is built Caterham has long built ...