I don't ever drip corals. I just float the bags and then put them right in. I don't think I've ever had a problem with a coral doing it this way. Most LPS aren't high light. Low to moderate I would say. Back in the days of metal halides, I found that things like favia, acans, wellsos, lobos, and the like would do best and be most colorful under about 50 PAR. Using LED, that's not very much. 40% may have been enough for it, or perhaps even too much.
I have a pair of Taotronics-like fixtures over my display and am growing and coloring up sps on the sand bed with 100% blue and 50% white. I'm stopping there. I feel that any more than that and I won't be able to keep LPS.