looking like the start of brown jelly, maybe you might have to pop him down, whats your tank aparame5ters again? Mainly alk, phosphate, and nitrate.
honestly man the pic is hard to see, I saw your other post about scraping, might be just growth. Keep an eye dont piss it off.....I dont think ur light is gonna fry that coral in any regards, I have the same coral in about SPS par right now