I just got my new compact flourescent lighting in, (Thanks Captive Reef!) and when I took the old NO fixture off, I noticed black scorch marks all along one half of the fixture... I had thought I smelled burning wire the night before but I have a cold and hadn't really investigated when it faded (timer turned the lights off) All I can say is whoa, that was close!!! The hazards of buying used equipment! Tank sure is happier with cf lighting!!!