I Wouldn't get these...
Personally, I wouldn't get these for nighttime driving in fog & in inclement weather for a couple of reasons:
1) The kelvin temperature is too high. I'd want 2500K not 6000K+
2) I would first want to read a side-by-side review to see how effective they are in nighttime fog/inclement weather.
They do look cool, but are they practical as a fog light replacement?
However, if you're not concerned about actual "fog lights" (I notice they don't even call them "fog lights," they're called "Daytime Running Lights"), then that's a different story. They do look great for show.
I'm very happy with my factory fogs and the H8 PIAA Plasma Ion Yellow 2500K bulbs that I'm currently using and I wouldn't be looking at these to replace them.