You can buy them HID plug and play ready on the www.LLTEK.com web site. I bought the black one for my 2000 a4. You can buy those with or without the ballast. Great product.

http://www.lltek.com/audi_headlights...g_lights_f.htm

 

LED's are bright at night, not bright enough to see anything on a dark country road, I live in bigger city and I get away with just having them on and not projectors.



Anyone know if there is a way to turn off yellow parking lights and just keep LED's on by themselves? - This is my biggest complaint with these headlights.