I have a 90 gallon 48/18/24. I will be hanging the lights evenly spaced over the top of my tank at about 8-10" off the water. From what I figured the 360W at 70 degrees would spread the light out too far in the front and back of the tank. The A360N only spread about 30 degrees......I assume 2 of the 360N's would be a better fit? Would my estimation be correct?