Changed my new light program and increased intensity, so far shows great improvement in size of my LPS and leathers at the sand bed level. I need to measure the par again to see if i can boost the levels even further. The theory of this as used by david saxby is that the peaks will allow the coral to "rest" in between, to prevent over saturation during photosynthesis... Basically it is to allow higher peak par levels without burning the corals, especially good for deeper tanks. Main lighting period is for 5 hours with 4 peaks at 1/2 hour intervals. At each peak i am running my hydra 52hd at almost full power, but it didn't burn the corals as it is just touching the peak and dropping down again. Also, with my testing with UV, i am running at approximately 70% without much harmful effect. So many theories for UV browning the corals or lightening the colours, no conclusive evidence thus far for me yet.
Here's an FTS for your monday blues