Originally posted by SVTour98: the yellows are more of a flood light, they're disperesed widely. the white ones are a beam, more like a projector. however, they really help vision at night on the road. just don't point them up too high otherwise you'll blind oncoming traffic. they're both fine for fog, arguably the yellow (crystal ion) are better for fog but i don't see a difference (roommate has them, i have the white).
Isn't the white light more reflected back from snow and fog ? Is Yellow are any good for good weather driving in complete dark when you just want to add extra light ?
