Katz where do you live? That's great your lfs has concern about there livestock but I know of a couple of people keeping them for well over a year in a 120 sps tank with 1200 watts of halides on them. If you have a cave for them to have shelter they seem to adapt fine. Also in these tanks they have been living in 79-80 degree water. Though this may not be the ideal conditions, we as fish keepers never can duplicate exact conditions and these fish thankfully adapt to our misgivings that we make. Thats what makes any animal amazing that they can adapt to there living conditions. For example if you lived in florida, you could could certainly live in Canada as long as all other enviormental conditions didn't change in an extreme way. As far as light out halides, leds, pc's, don't even come close to comparing to the sun. OK I'm rambling. Regards, Tim