The fog lights on my 2010 2500HD kinda suck! I switched out the bulbs to a Sylvania silver white bulbs..or I think if was called something like that.. It's a touch better or still barely visible from the cab. I checked the aiming and that looks okay. Is there some kinda mod to make these brighter? I was driving next to my friends 2011 2500HD and his fogs whale..I was jealous.