I have a 220 mixed reef. Currently I am using 3 xr30 pro g4. I keep the lights pretty close together on an rms rail suspended from my ceiling. I keep them closer to the middle so the ends of my tank are kept a little darker to accommodate lower light corals. Right now I’m at 9” above the water with diffusers. I’d like to raise them a bit to 12”. If I raise them, are the diffusers still needed or will the additional height allow for better blending? I am currently running 70% of the schedule slider on wwc/ab* template, how much should I raise the schedule setting?