Yeah it's kind of a mystery to me. Everything seems to be doing Allright until one of my sps looked like it was bleaching at the base after it showed some growth, and then I had 3 polyps of zoas that weren't looking good and not opening that I moved to the top of the tank and now looks great where my other zoas are doing OK at the bottom of the tank.
I saw one guys running the same light at me doing 100% whites for 5 hours during the day and getting good results where others are running at 30%.
Seems like a crap shoot to me. I just wanted to see some led schedules that had had great success.
When LEDs first hit the reefing community and became widespread many were DIY and people ran them full out and bleached corals, I feel like the pendulum has swung the other way now and based off those experiences many people now run their LEDs far too low and they lose coral and don't understand why. Unless someone really goes full out with lighting you can look at the coral everyday and tell if they are starting to bleach out or not from too much lighting. FWIW I was running 2 value fixtures at 100% over a 65g and there were only a few corals that didn't like it. But corals are really adaptable to different light levels!
There is no need to run whites more than 4hr/day unless you like it.