Thanks! I should have known that one since I've seen them before. Right now it is under 192 w (Power compact) I had it in my reef tank but I think the 3-250w MHs were too much for it so I moved it to another tank with less light. Do they sting? It is my sea horse tank right now, but I have the sea horses back in QT so there is no danger to them. ( if it stings I will move it to yet another tank before the Sea horses get returned to their tank)