What You Need to Tell Us When You Place Order of HID? 1. You need to check out what lamp type your car is, there are types showing as below, when you place order , please tell what type you want; We have bulb types : H1,H3, H4 ( high beam), H4( low beam), H4 H/L, H7, 9004, 9005, 9006, 9007.. 2. And tell how much color temperature you want, we have 2300k, 4000k, 6000k, 8000k, 10000k, 1200k. The higher color temperature, the more white and blue the light is. Normally people like to select 6000k, 8000k. 3. You need also tell what package you like ( showing on the picture ) , we have blue and black ones, both are with color printing, they look very professional and luxury.