I'm in the process of getting my 6'L x 28"H 150 gallon tank ready, and the only part I haven't quite figured out yet is the lighting. I'm trying to aim for the higher end of low->medium lighting (high enough to grow some plants other than anubias, but not to the point where I need to add CO2). So here are the choices I was looking at: either 2 36" AquaticLife T5 HO Dual Fixtures (equaling 4 T5HO, which I have a feeling might put me too high), or 2 36" Hagen Glo Single Fixtures (equaling 2 T5HO). So which would put me between low and medium lighting without having to add in CO2?