probably same reason people think that their 12000k HIDz!11!!!11!yo will be red, blue, green etc and super bright. There is a lot of misinformation out there, and no info controls. I mean what percentage would you say of people into cars are even remotely aware of the basics of HID lighting? Now compare that to how many people have HID kits from china, thailand, etc. People don't know any better and they fall for false advertising and thus there is no incentive for companies to actually report the facts-- i.e. this kit/bulb/w/e will produce a blue light not white and will be not quite as bright as this other bulb.