I run yellow tint 100w halogen lights u can run them in snow storm but in heavy fog and blizzard have to turn them off . I think for fog u need yellow and low watt like dim . Maybe some of those plastic covers would help
Fog lights should have a sharp vertical cutoff and wide horizontal dispersion. I'm pretty happy with Morimoto XB LED's I just put in my truck.
https://www.danielsternlighting.com/tech/lights/fog_lamps/fog_lamps.html