2005 gmc yukon headlight question

These have been installed for at least 6-7 years without issues.

The clearcoat on the headlights has had to be fixed, but that's an issue from the manufacturer not from the HIDS.
 
Nice! Didn't expect such a good result. And as for the HID bulbs what K rating did you have and did they change color with time? Did they become bluish?