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Mechanics and Maintenance7 min read

Vehicle lighting and signalling

Sidelights, dipped beams, full beams, fog lights: knowing when to use each type of lighting and avoiding penalties.

Updated 13 June 2026

What this lesson covers

The dual role of lighting

Sidelights

Dipped beams

Full beams

Fog lights

Daytime running lights

Signalling lights

Summary table

Recap

  • Lighting serves to see (dipped beams, full beams, front fog) and to be seen (sidelights, brake lights, rear fog).
  • Sidelights and dipped beams: never prohibited. Dipped beams recommended even when sidelights suffice.
  • Full beams: compulsory on unlit roads. Switch to dipped beams when meeting, following closely or in bad weather.
  • Rear fog light: only in fog or snow. 135 euro fine for misuse.
  • Daytime running lights (since 2011): automatic, white, front only, do not replace other lights.
  • Indicators clicking faster than usual = a bulb is probably blown.
  • A dial allows you to adjust the dipped beam height when the vehicle is loaded.
  • LED lights consume less energy and last longer than halogen ones.

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Sources: Sécurité routière (securite-routiere.gouv.fr) and service-public.fr.