I have an AGA 65 gallon (L 36" x W 18" x H 24"). I have a canopy in which I will retrofit my lighting. I plan on have 110 watts of PC actinic lighting. My problem is that I am not sure how much metal halide lighting to use. The tank has a center brace which will force me to use two metal halide lights. Should I use two 175 watt halides or two 250 watt halides? Not sure what I want to keep in the tank yet, but would like to set it up to where I could keep anything (e.g. clams, SPS, etc). Your thoughts and advice are appreciated.