Low beam because high beam emitts too much of a pattern and basically does not help you. If you live in area that has alot of fog problems look into foglights. Also, in snow the same stands true.
Low beam or fog lamps only.
fog light and/or low beam
Low beams
low beam
Low beam headlights and fog lights if the vehicle has fog lights.
Dipped beam, yes - main beam, no.
Fog Lights only, Low Beam only or Fog Lights + Low Beams.
High beams enhance the fog and make vision worse.
No, you should not use high-beam headlights at all in heavy fog.
Use your low beams or fog lights. Fog or snow will reflect high beam light back in your eyes making it more difficult to see.
You can but it makes matters worse. This would be the time to use your fog lights if you have them.
You should not use your high beams in the fog. Your high beams will reflect off of the water in the air from the fog making it even harder to see.