blue headlights

Can you tell me more about the real silver star and the GE night hawks, Philips 50+. Where to get these?

google them

i have read that the silverstars dont last long, the nighthawks are brighter, anyone know how long they last.
what is a brighter bulb, 6000k or 7000k

dthe higher kelvin you go the less light ouput you get because the bulbs are tinted more.4300k is pure white and 6000k has a more blues tint