It was snowing hard this morning on the way to work. Hard enough that you could only see the road in front of you and the taillights of the cars in front. I tried my new OEM fog light mod that I installed a few months ago for the first time. It really lit up the road in front, under the snow, and to either side. I could also see the shoulder of the road and the adjacent lane very well. My first fog lights so have nothing to compare but I was very pleased with what I saw this morning. It should work equally as well with fog.