So far so good. They are quite bright with a blueish tinge to them. They won't illuminate the road in front of you noticeably compared to headlights of course (but then, the same can pretty much be said of 55W filament H3 bulbs), but they will look much better than the yellow H3 filament bulbs. I installed them in my Chrysler 300M fog lights. The LED H3 bulb has polarity where H3 filament bulbs do not, so I had to reverse the wiring inside my foglight housings to make it work. I also sawed off the metal reflector that stops the 55W filament bulb from annoying oncoming drivers. Not too much extra work.