sorrt if you feel that way but, You can code out the voltage/current check with Carly for BMW and you CAN run LED headlights with no resistor or can bus fooling device, how am I so sure about this, that's easy because I have done it !!! and as far as the Philips halogens go you will have to ask them how they achieve the higher output in their bulb, I expect they know the answer, as far as the aftermarket projectors, they are designed for HID so the optics are very well able to control the cut off and beam pattern without dazzling other drivers, it's not like fitting a HID into a reflector, and As for attitude, well, I asked a simple and polite question, the first post was not an answer but a why would you want to do that retort with no relevance, just dismissive comments so there was the attitude, but like I said I don't hold a grudge and I'm happy to have been able to give you some technical info re LED and Carly coding that you didn't know about,