Read this thead. It will help with understanding HID's better
http://www.8thcivic.com/forums/light...-tutorial.html
You can get PNP HID kits for as low as $50 plus shipping and some kits like PIAA can go as high as $500-$700 or so. I only spent about $89+$30 for the HID relay harness. If you do get one stay within the 4300K range on the bulb. I got 8000K and now wish I had gotten around 5000K. Remember though that you get what you pay for.