I received my second headlight yesterday, and I think it's busted. It looks like there's some kind of charring in the main reflector. Like the bulb in it blew up. Hrm. My first disappointment on this project! I'll take a closer look at it and see if there's a way to either clean it out, or refurb it somehow. It only cost 20 dollars, so it's not a total/epic failure, but it's a little sad.
The new one is the one on the left.