What kind of corals are you keeping. You most likely don’t need 100%.
I have two LED 50s and max I run is 50% (unsure of what par I’m getting) but I feel 50 is very bright. I soon need to invest and rent or borrow a par meter just to get an idea.
Also if you look of the Red Sea website at the fixture they have a general par output chart based on mounting height and distance below water. You have to assume that chart is based on 100% though.