Well, I have had compact, t-5, and metal halide lighting. I like t'5's and metal halides. From what I read, the colors and look of the tank is amazing in comparison. Not to mention that the energy consumption is low. I could just go buy a metal halide pendant, hang it and be done with it. I can not go into the specs like color choices, par, etc, as I am new to the whole led thing, but someone else is more than welcome to chime in. This is something I want to try.