5000K Xenon HID kits produce light with a pure white hue to it, slightly whiter than typical OEM bulbs. If you're looking for that natural Xenon look 5000K may be the way to go. They will not stand out as much as other color temperature but still show that luxury look only true HID can produce. 5000k Xenon bulbs produce approximately 3000 lumens.
Not sure what bulb your car is using? Try this Automotive Bulb Reference site to get the proper bulb information for your car.