OKay, so here is my question. I want to improve the lighting in my tank. I want a metal halide. Right now I have a JBJ 24" PC fixture its wider than most 24" fixtures, such as the dual satellite, by about 2 inches. It also has triple cooling fans. So I was wondering if anyone thought if it would be a good idea to take one of the bulbs out and see if I could squeeze a metal halide light in there. I think if would definately fit. Of course I would have to get the ballast and I'm thinking the triple cooling fans are more than enough to keep it cool. If it does sound like a good idea then should I change the 10,000K bulb for a 10,000K halide OR should I change the actinic bulb for a 20,000K halide. Please help on this!