I installed Bosch H4 conversion lamps first the upgraded those to bi-zenon HIDs They have a small relay in them that pulls the lamp inwards to refocus it for highbeam. I went with 6000kelvin which is a really bright white with a blue tinge.. If you go higher then you get into the purple but get less light on the road.. seems counter productive to me! I also changed all my dash lamps to blue LED
My single cab has 8k's. I love them. I've got a set of the new corvett C6 headlamp assemblies that I'm going to try and make fit into my way oversized bumper for even more off road/trail useage. Well see how the cops like that?
93 W250. Waiting on EFI live to come out with a ve version.