Just to compare notes:
I have a 48" 4 bulbs hybrid. The intensity is slowly ramped up. Now it is at 58% for both led (R set at 25, B 190, RB 255, W 90) and T5. The light is 10" above water.
11" below water surface, par is 300
22" from surface (bottom of tank), par is 240.
I plan to have it all the way 100% but I will watch carefully not to bleach any coral.
How high off the water do you run your light?