answer as to what Eric said.
i have tried 7000K HID conversion kit and got no near happy with it.
it's all about the projectors, not the Ks that matters.
to ppl that think their HID conversion kit (without Projector conversion) that rules the whole world, think again. HID conversion kit on the celica projector just isnt look right. It is brighter, yes, but it does not shine further. Sadly to say, my stock bulb can light up the road area same as a HID conversion kit.
4100K - 4300K is the brightest. anything above, will just make it blue and dimmer.
by the way, eric, those valeo (sp) projectors are super hard to come by... damn it...