We are recovering from a six inch snow fall with temperatures just warm enough following to melt snow on roads and create black ice. This morning, I drove my new Smart with foglamps for the first time since the snow. It was still mostly dark when I left for work, and I used my foglamps to help illuminate the road. Very, very helpful in seeing the ice.
I highly recommend the foglamps, especially if you have bad roads to travel in "iffy" conditions and poor light.