I ordered and installed 3 sets of hid lights (high Low and fog) in July of 2014 for a 2012 f-150 with aftermarket headlights... 1 set h-7's 1 set of h 1's and 1 set of 9140 bulbs all with 35 watt power supplies Since then I have replaced 4 ballasts that have died and now 5 bulbs all since may of last year. I called their service department today and they tell me that the parts are no longer under warranty and that the manufacture of the bulbs suggests a 1 to 2 year life span on the bulbs and to get 2 new bulbs I have to pay $90.00 for 2 generic bulbs that are all over the internet for $20 to $40 per pair max... There is no know reason to spend xrta money for xralights you can just buy 2 to 3 extra sets of the cheap hids and swap them when they fail and still be ahead of the game. By the way all the lights were professionally installed... Save your money spending more doesn't fix the problems...