Drivers must adhere to the Highway Code and the Road Vehicles Lighting Regulations 1989 to avoid dazzling or causing discomfort to other road users with their headlights, especially at night or in poor weather. The law prohibits the misuse of full beam and hazard lights that impair others’ vision, with specific guidance to use dipped headlights when oncoming traffic is present and to avoid using fog lights unless visibility is severely reduced. Proper headlight alignment and cleanliness are also essential to prevent glare.

Failure to comply can result in significant penalties, including on-the-spot fines of £100 and three penalty points, or in court, fines up to £5,000, nine penalty points, and possible driving bans. Drivers are also advised to avoid unnecessary brake light use when stationary at night by applying the handbrake and releasing the foot brake, reducing the risk of dazzling drivers behind them. Overall, responsible lighting use is critical for road safety and legal compliance.