Slightly off topic but related, my ATI T5 dimmable`s have a 10 step run program, and thinking that by setting them at say 30% at 10am and then 60% at 12pm and then down to 30% at 4pm this would give a nice curve, however after checking this at various times during this cycle it was extremely easy to see that indeed at 12pm the lights were at 60% but by 12:03pm they had come down to 58% so what I learned from this is the amount of time gap between the 2 settings dictated on how fast the drop off or ramp up was, adding in an "extra" step resolved this for me, so now the program runs like this: 30% 10am, 60% at 12pm, 50% at 3:55pm and 30% at 4pm, thus the drop off now is only 10% between 12pm and 3:55pm thus giving the corals more "peak" light for them 4 hours nearly.
You may be wondering why I only run at 60% max, and this really is plain and simple, if I go any higher (which I would love to do) it causes most of my corals to close down/start to bleech/strip, which again relates to the understanding that what light we can "see" is not always the best way to judge what the corals want/need, I will also go to the extent of saying only use a par meter as a "rough guide as well" as what is recommended for corals in par on many of fact sheets out there, is not 100% correct, after checking countless times on my par senseye meter, nothing in theory should be even alive at the low par levels they are getting, yet I am getting growth and good colours, also with the senseye the colour curve is IMHO a waste of time, when I was running leds I tested this curve to see if I could get near it, in truth having the meter right up against the different colour leds at 100% brightness I could never get some parts of the spectrum anywhere near what it would recommend (red/yellow/blue) knowing that running these colours at 100% would certainly bleech out the corals I stopped chasing the spectrum curve and just concentrated on getting the corals happy over a period of time with various changes.
I guess what I am trying to get at, is dont be too concerned about chasing the "perfect" colour/par numbers, instead use the corals as your guide, the corals (like in warbys case) can tell you if the light is right or not, even if we think its not right, let them tell you... Big Thumbs Up