I only have the standard flourescent lights that came with that tank, but that's all they've had and they are sprouting all over the place. Even on the bottoms of my rock structure where there is hardly any light. Those aren't even the biggest mushrooms i have in that tank. But I will be coming to their rescue shortly as I have CSL lights on the way. Thanks for the help, I'm a bit retarded as well. The more I think I know about this hobby the more I realize I haven't a clue.