Planning a tank build, but keep running into issues with various sizes, custom vs stock, etc. With the Marineland 300g DD (72,36,27), the 36inch deep seems to be a problem for lighting. 3 xR 30 G4 pros cover the the 72 x 24, but I guess I'm going to have to get 3 more maybe xr15's to cover the extra 12 inches? the g4's say a recommended spread of 24x24, but max of 32x32 spread, so maybe I'm only talking about 2 inches in the front and 2 inches in the back that aren't getting covered? If it's lower light corals on the sand bed in the front, maybe it's fine? Seems like spending another 1-2k for that foot of coverage makes the 300dd a no go if that's what would be recommended.