I have a 05 yukon xl with the OEM Denali projection headlight housings. It currently uses 55watt 9005 for the high and low beam bulbs. I have already upgraded the wiring harness for the headlights. The wire goes directly to the battery and thru two relays. The stock harness is just used to trigger the relays. I recently saw a set of 80watt 9005 at a truck stop. I have tried all the fancy bulbs out there. from piaa to sylvania. I currently am running 55w GE night hawk bubls. they were great at first but the light output has seemed to degrade over the course of 3 months (they are 3 months old) I almost took out a deer last night on my way to the gym. Likely he stopped running as I slammed on the brakes. He stopped about 1 foot from my drivers door and just looked at me. So, I am curious if you guys think that 80w bulbs will melt my housings? I do not want to go HID. The Sheriff deputies around here are known to impound vehicles with aftermarket HID's on them. Plus it just gives them a reason to stop me. Not that I have anything to hide. Just don't want to be inconvenienced because I decided to put HID's in.