I have replaced several. Ultra-crap. Not only are the lamps proprietary, the ballasts are on a little PC board and are not worth replacement.
Oddly enough, I have a community that I work in that has has some of these lights that I've been replacing as they die, and there are still some units that are operational after the 4-5 years that I've been servicing this community. However, I would still not advise their use.
Good Luck!
