SPS bleaching question

[mikeclarke]

Hi there, I've got an Emerald Sky SPS coral and I moved all the spa corals up from the bottom of the tank on top of the rocks. I was told that this coral likes bright light and it is a 5 inches below the surface. I use sun brite LEDs for lights. Only this coral has gone white at the top tip. Has anyone else experienced this? Ive moved him down to the sand bed for now.

Any help would be great.