They are not affected by any sunlight as i read up in some websites. iF some of ur coral dies with skeleton then its hard for them to recover or reattach bcos there are too much algae around. Unless u brush off the algae.
When i bought them some already half rotted.. Now they are in full coral, all recovered. Exception only only 2. already too late, nexted day 2nd day rotted already...
Now i still got 30- 40 heads + 1 mini (baby on my live rock)with everyday of feeding..
Cheers...