do those 8k have a purple tint?
Sure do. It really depends on what angle you look at them, from the side they have a really purple tint, but when looking directly at them they have a crystal blue color.
And Zero, the visibility at night is awesome. It lights up the whole damn street, so I don't know why so many people complain about 8k's not being bright enough. Sure, they are not as bright as the 4300k's, but they are sure as hell brighter than my stock bulbs.