Please dont waste your money. Blue coated bulbs are terrible! They dramaticly reduce the amount of light output. You wont be able to see squat on the road. Trust me. Go ahead and buy them and see for yourself if you dont believe me, but buy them from ebay and save yourself some money so you dont waste too much. If you want the look of HID but dont want to hastle with it, the best filament bulb you can buy that will get you closest to 4100K is Sylvania Silverstar Ultra bulbs. You can get them in any size at autozone or order them online at www.amazon.com for around $36 for two free shipping. Although they are slightly blue coated, they put out an extremley bright white light. I have them in my moms, dads, sisters and girlfriends vehicles. They are the best filament bulbs on the market. Compare for yourself, buy those blue bulbs off ebay and put one in one headlight and put a silverstar in the other. Then tell me im wrong.