Bleaching leptostrea?

[MRB]

What should my plan of action be for a bleaching leptostrea. Has been doing great for over a month in a lower lit area of my tank with moderate to low flow. Out of nowhere it started bleaching. Tank parameters are standard. Don't know if I should give it more light, or give it less? And ideas?

 

[NY_Caveman]

Do you have a picture? Any idea what PAR it is under?