Alright. I "inherited" some stuff yesterday one of which is a MH pendant and ballast setup. In the pendant there is a 400w bulb and two 32w actinic pc. lights. The light is mogul style (I think) they bulb screws in. I thought it was a 250 when my friend gave it to me and he wasn't sure because I guess it was sitting in his closet for a long time. I unscrewed the light last night at turns out its a 400w. That's a ton of juice. I was wanting to use a MH in a smaller tank someplace to help grow out little coral frags. Like in one of my QT tanks when they are just sitting there running empty anyways because I haven't made any decision as to any other fish to put in my dt. The clowns have the run of the place haha. I figured I would hold off putting more fish in until I solved the YWG & tiger pistol situation anyways. Well I have two QT tanks. One is a standard 20g the other is a 20 long. I thought heck they sit there empty all the time I could throw some small frags in there on some egg crate or something and let them grow out a bit while they are empty running. I thought it would be ok with a 250w but with a 400w will that just burn things up? Or should I just try to put the light up like 12 or 18 inches and still be ok? Also I guess these bulbs are old and was wondering if anyone had any laying around. The main bulb is a 400w screw in type and the others are 32w pc actinic I guess they are square pin, it's two little lights run next to each other then connect in at a square base. I'm unfamiliar with using anything other than T5. I know I don't want to fry stuff and this is a LOT of light for a 20g QT tank or two. I imagine I could raise it up enough to hit both tanks if they are close or just have it concentrate on one. Let me know if anyone has any ideas or extra bulbs of either type.