I put some of those sylvania silverstars in my wifes car and they suck. No differance that I could see. The light was whiter but not brighter than the blue ones I had in there from another car I had them on. I think the problem might be that the regular bulb is a H7, this is about the weakest bulb out there when it comes to ilumination. The old blue one burnt out so I put in the silvania's and was not pleased with them at all. I will go back to the blue bulbs I had in before. I was thinking of putting in a differant bulb all together by putting a wire in the plug since it seems like the factory plug was actually intended for a differant bulb anyway. This would explain why we have to use a adapter on the h7 to extend the length of the bulb. I can't remember what bulb is three pronged and I'm not sure on the interferance. The H7 is a weaker bulb when you compare it to other bulbs anyway so a change in bulbs would increase the light put out and be worth the rewireing of a relay and power. If anyone has tried this out let me know otherwise I'll keep you guys informed in what I find out. Probably just gonna have to test fit bulbs till I find one. I just figured for what you pay for these bulbs they would be better than they are. :wtf: