The 102 will be much more light than need. I run 3 -102's over my 82x30x28 tank and they put out plenty of light and parMy tank dimensions are 24"x 20"x 20" I am currently using an xr30 g4 pro I am thinking of changing it because of the fan noise I am thinking of an ati straton pro 102 model and I am planning to make the tank full acro but I am not sure if the lighting will be enough