I'm using Luminix Ti White bulbs in my head and fog lights. The vendor a purchased them from rate their color temp at 5500K. I'm very pleased with the light the put out and their appearance.
2013 ST2-Tux Blk, FSW 93 Oct tune & 3" cat back, Steeda R sway bar & CAI, Sparco rims, Luminix Ti White bulbs
2007 ZX14 Sato Ti exhaust, PC III, CF bits 'n pieces
2011 M109R buncha stuff