Yeah, the projectors use H1 bulbs for the high and low beams. My high beams are basically useless now...they dont come anywhere near the brightness of this kit.
so, my conclusion is that eBay/sonar projectors + HID's are pretty much compatible IMO. This is for their H1 projectors only. I know that with their h3 projectors, you need to get a "mini" hid bulb so that the focal point is correct and you'll get more light output. Also, driving tonight in the rain is amazing...i can see a lot better than what i could with my halogen bulbs.