I bought a set of these lights, the first set were installed and used for a few months, then one was scratched by a sign in a wind storm. I had the collision shop order the second set. They installed them in the summer. I am not sure when exactly a halo lamp went out in it..but I was not in a hurry since my mustang goes into storage in October, and figured it could be replaced then. I sent the car to collision shop to be checked out. The confirmed it was the light and not the wiring. The called the company and the refused to warranty it...they only offer 60 or 90 days (I'd have to double check). This is a SUMMER ONLY, nice weather ONLY car, rarely driven at night, and there should be no reason why a bulb should be out. I maybe had a total 5-10 hours of use, if that!! Buy from somewhere that guarantees their product for longer!!!Just OK, difficult to install, even more difficult to adjust. The Halo isn't very bright and the lights are a little lacking as well.They look great and work even better.