[nosilver4u]

I usually have mine on for about 16 hours a day, as I turn em on in the morning before I go to work at 8 am, and then turn em off before bed at midnight. That's probably why I always have algae problems, so I've gotten a plecostomus for each of my tanks. I dunno if this is bad for the fish, although I definitely wouldn't recommend it.
Now I suppose I'm going to get chewed out for it, and feel badly, and start turning my lights on at noon. Really, the only reason I haven't changed it, is because the lights are what heats my tanks since I can't afford heaters yet, although they never get below 74.