radion sps 75g tank

Hi everybody, I moved from a 40G tank to a 75G tank (48’’x20’’x20’’) with sps predominantly. I am now lighting it with 2 X15 G6 Radion and a X30 G6 Radion (the X30 is placed in the center and the two X15 on each side). The lights are positioned 6’’ high from the water and run at 80%. I wonder...