This is where I bought my kit, I have 55 watt low beams that are 8000k
and 35 watt fogs that are 6000k

Just thought I'd share this info as they are cheap and they work VERY well not too mention they have a lifetime warranty.The replacement bulbs are cheap as well but both the bulbs and ballasts are made very well and I have yet to even have a problem with mine. There were a few people that asked me about my hid's at a meet a while back.

HID Kits: HID Kits, DEPO Lights, BMW Bumpers & Lighting - DDM Tuning