You should use low beams when driving in fog. It is more difficult to see driving with high beams in fog.
No, you should not.
low beam
NO
No, you should not.
fog light and/or low beam
low lights
When driving in fog you should always use your low beams. Using your rear fog light when visibility is less than 100 meters is also a really good idea.
Yes
You should never put on your high beams - it makes it much worse.
You should never use high beams when you are driving in fog because they shine up and ahead which will be reflected straight back into your eyes by the fog. Low beams (which aim downwards) and front fog lights (which are lower) are far better suited.
No...it lights up the fog making vision worse. Fog normally is least dense at the bottom and rarely reaches all the way to the ground. Thats why fog lights are way down low and why low beams are better than high beams when driving in fog.