As "adapters" I mean electric transformers from 12v to 20kv or somethingh like that. These bulbs consumpiton is 35w each against 55w for the original ones. I didn't know some cars have cooling system for xenon headlights, crazy! It has to be both overheathing and light wavelenght, for sure. Just it's too bad that I have to take all off 'couse result is great. Does anybody know a way or a serious supplier for this kind of stuff that can help me out?