Theory Test

Study topic

Vehicle lights and when to use them in Ireland

Using your lights correctly lets you see and be seen. The theory test checks that you know which lights to use and when.

Key facts to remember

  • You must use lights from sunset to sunrise and whenever visibility is poor.
  • Use dipped headlights in towns, in fog, rain and when meeting oncoming traffic.
  • Full (main) beam helps on unlit roads but must be dipped for oncoming traffic and when following.
  • Hazard warning lights are for warning others of a breakdown or obstruction -- not for parking illegally.
  • Faulty or dirty lights reduce how well you can see and be seen.

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