For anyone considering the Nokya Arctic White H13 and H10 replacement lights, check out this link. It would apprear these lights are weak and actually less effective than the stock lights. Whew, and I was just about to buy them! I raelly want a whiter/brighter light without the HID price. Guess I'll wait until Silverstar makes an H13 and/or H10.
Link:
http://www.f150online.com/forums/ search for h13 or H10