They’re subsidized by SDG&E somehow, so you’re getting them way below cost. I used these years ago when they first came out and they burned out faster than a string of cheap Christmas lights (except they cost about as much as a Christmas tree back then), so I gave up on them, but I figure that for 25c each, you can’t go wrong.
I read on the Energy Star site that you should leave them on for at least 15 minutes each time you use them to extend their life.
What are the good brands that you’ve found?