I got the Silverstar H1's for Christmas and when I installed them they lasted about 2 weeks. So I called Silvania about it, and they said if I send in my old ones then they would send me new ones. And 2 weeks later they did. I had no problems dealing with them. They were all very nice. Also i sent these back with NO receipt. So to make a long story short. I believe that they revised the H1's. The old set I think were 68 watts. The new ones are 55 watts. Also I noticed that they sent the individual ones. Not the 2 pack. So I am praying that these won't burn out!