I have the Xentec lighting kit installed on my 2003 gmc seirra ;?

The color of the lights are white w/a hint of blue shade but when the lights are on for a while they seem to look more white than anything. i got a fix it ticket ,so i have to put the old bulbs back in can i just change the bulbs back to the old ones or do i have to take the kit out?I have the Xentec lighting kit installed on my 2003 gmc seirra ;?You have to remove the kit as the new bulbs required a transformer in the kit. If you do not remove the kit, you will be replacing the headlight bulbs very often!!!