Maybe I wasn't clear. That schedule is one that I believe to be inappropriate. I do not use it. It was sent to me by a friend, new to the hobby that recently sunburned all his coral and the Coralline Algae on the tops of LR. Many of the coral received a fatal dose of bright light (mostly blues set at close to 100%) in just a few days. His coral started dieing a week after the overexposure and kept dieing for two weeks.
There is very serious trouble with this blue light, formerly referred to as Actinic blue, that hobbyists may not realize. It is the fact that our eyes do not recognize the intensity of this bright blue light. It is burning our coral but we can't see it. We only see the effect after the sunburn.
Copied below for your benefit, is what I said in the OP about the problem I see with that pictured schedule. I was wondering if anyone else sees the same problems that I see:
1. the intensity of the blues is set too high;
2. the effective photoperiod is set too short (with sunrise and sunset ramping set way too long);
3. the spectrum of light may actually be inadequate
Aloha,
Mark
P.S. It's very difficult to get an accurate PAR reading of LED lights, because they emit such a narrow band of the complete spectrum. On!y the newest, high price, top-of-the-line PAR meters can give an accurate reading.
Red, green and white, are not just for our eyes. The white LED's in these Hydra and Prime fixtures probably emit some red and green too. In shallow water, where many SPS coral live, coral are exposed to a fuller spectrum, including UV. These days we don't bring coral directly from the ocean to our tanks. Coral we see today has been grown under artificial lighting, typically less intense than in the wild.
Having been exposed to all the different types of lighting this hobby has used, and finding MH lighting to be a standard to which we often compare, I found my recent installation of a 150 W 14000 K MH and a Hydra 26 on either side of a tank to be quite revealing. To make the LED light match the MH, the violet, blues and white were set in the high 30% intensity with UV, red and green about half that.