Good to know. One of my bulbs failed on me last year, but I had a spare leftover to drop in from when I used to run quads. I should probably start thinking about getting a new set of bulbs, cuz the other one can't have too much life left in it, I wouldn't think. These are the Morimotos I got from TRS forever ago. 3 of the ballasts I had from them have died too, replaced those with a pair of Koito ballasts and really like them.