You should use low beam headlights and, if your vehicle has them, front and rear fog lights , but not high beams.

Correct lights in this situation

  • Turn on low beam headlights so you can see and so your rear lights come on for the car behind to see you.
  • Turn on front fog lights if visibility is around 100 m or less, because they are designed to shine low and reduce glare in fog.
  • Turn on rear fog light(s) if visibility is severely reduced (around 100 m), to make your car more visible to the driver 100 m behind you.
  • Keep high beams OFF , because they reflect off the fog droplets and actually make it harder to see.

Simple rule to remember

If you can’t clearly see beyond about 100 m (roughly a football pitch), use:

  • Low beams
  • Front fogs (if fitted)
  • Rear fog (if fitted and visibility is seriously reduced)
    and never use high beam in fog.

Information gathered from public forums or data available on the internet and portrayed here.