I recommend the Philips brand, since thats what i have had in my teg for the last year. I love the color, the intensity, and the look from the front. Gives the purest of white color. To high of a K will result in loss of intesity. Just think back to the first generation of ion blue bulbs, it was impossible to see the road.

Here is a link to my pictures I took of my HID

My HID page