Ok, after looking into it some more I decided on my lighting system to go inside a wood canopy for my tank. I like the single-ended 250W metal halide retrofit kit from HelloLights. I think this will work good on my 30-inch deep tank. There's 9" of space between the inside canopy top and the hinged glass lid of the tank. The canopy has no back to it, but I was wondering how do I keep the system cool? Can I hang a couple of fans off the back of the canopy? I do have a friend who's good with wood, so should I have him maybe cut out holes in the top or sides of the canopy for fans? Another thought--I was thinking of adding a single 96W AH Supply kit to go across the length of the tank--it's 48" and I'm thinking of staggering the lighting to come on and off with the metal halide--oh boy, I'm getting really excited now! and maybe adding some lunar lights too. I think I'll have an electrician do all this for me since I don't want to burn the house down, lol. Does this sound good to you guys? So far you've been a great help on this forum.