I have some experience with this same type of coral.
Under low or non existent Nitrate and Phosphate the strawberry shortcake will bleach easily above 400-450 par with halides.
Up the nutrients and it seems to be able to handle much more light without bleaching.
I had a thumb sized frag of SS under a Hydra52 in a shallow stock tub and had little to no growth and brown out over the course of a year. My nutrients were fairly high and my light program was biased toward blues and fairly low par.
I swapped to a singe 400 watt Radium 20k in a lumenbrite large reflector and electronic ballast providing about 600 par to my frag rack = explosive encrusting and bush like growth. However, despite rapid growth, the new growth seems to be fairly pail at first. The coral continues to grow but the growth sections don't develop good color on the skeleton or in the polyps until about 2 weeks to a month of development.
With the increased par i thought i was burning the coral at first. But upon closer inspection this was actually new skeletal growth with infantile polyp cups, not the bleaching and recession as i originally thought.
Wish i had pictures to timeline the progress, but that was a while back.