I'm really puzzled on how you're getting away with these extremely high numbers. If you look at the research....specifically @Dana Riddle 's eloquent work that was presented at MACNA 2016....he showed that Rate of Photosynthesis (in Porites) maxes out at about 115 PAR:
And, once you get past 200 PAR or so, you start getting photoinhibition....slow down of coral growth.
His conclusion about light from this study was a PAR between 115-200 for maximum growth rates.
I've got to believe you're in full blown photoinhibition in your tank, similar to what Dana found mid-day in the shallow tidal pools.
If interested..... and I've linked this video so many times, I'm going to have to start paying royalties....here is the entire talk from Dana.
In part, because of this talk, I've increased flow in my tank (5 foot 90 gallon tank) by having four MP40's and one MP10...and considering adding one more MP10. In addition, I've turned my lights down. I used, what I call "the Poor man's PAR meter"....in fact, a LUX meter...that I purchased for less than $15. My corals grow like weeds! It is my opinion that this video should be mandatory viewing by all new reefers.
I'd be curious to hear about your coral growth after, let's say, three months.
This coral would be a brown turd at 200 par lol.