HID bulb conversion ?
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#13
I'd have to look, but I'm pretty sure the Ultra's are 4100k and hte regular ones are 4000k. This hardly seems like it would make the difference, and on top of that, the lower one should be better in rain imo, not worse...so I have no idea why they're different, but in the vehicles I tried them in anyway it was a huge difference. There is a chance that other headlights/reflectors etc. would have different results too...I only tried them in 2 vehicles.
#14
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