Highway Code Rule 113

You MUST

• ensure all sidelights and rear registration plate lights are lit between sunset and sunrise
• use headlights at night, except on a road which has lit street lighting. These roads are generally restricted to a speed limit of 30 mph (48 km/h) unless otherwise specified
• use headlights when visibility is seriously reduced (see Rule 226).

Night (the hours of darkness) is defined as the period between half an hour after sunset and half an hour before sunrise.

Laws

• The Road Vehicles Lighting Regulations 1989: Regulations 3, 24 & 25 (In Scotland – Road Traffic Regulation Act 1984: Section 82 (as amended by New Roads and Street Works Act 1991, Paragraph 59 of Schedule 8))

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