I'm not sure what his red /green settings are at. I doubt they are on full. I'm not one of the scientists that you see on most forum posts. Just observation, common sense.
Our sun gives us a wide spectrum of colors. It is so bright that we commonly think of it as a singular daylight color. What I do know is that blue spectrum light has a better penetration without filter as it goes through water. Is why we have blue oceans and skies. There was a good topic recently about this. Basically corals can grow at surface. Meaning they adjust.
Back to the hydra 26hd, I thought u would find it interesting or a different perspective on this fixture. Led in general have spotlight or hotspots. Can burn corals. I think it's because hobbyists are not using enough actual leds to broaden the source. Instead, they use fewer, spread farther apart. Causes hot spots and the silly crystal ball colors on the bottom everyone is worried about. The 5ft tank I mentioned with uses 5 26hd's has his whites turned way low, uv and blues at 105% . Tank is brightly lit, not overly blue, shadows minimized, no crystal ball spots.
I will note, he told me he researched how to use the hydra26hd to be as close in spectrum to a 20k radium as possible. With some search, probably you could find that article.
