Meridian what percentage?

[Tahoe61]

My Meridian 11 is 14 inches above the water line, I have been running it at approximately 35% for 12 hrs, over a 25 gallon lagoon.
It's been a little less than 1.5 months and I have noticed some Zoanthids and Birds Nest appear to be losing color. It's my experience that the cause is possibly over illumination.
Is it that really possible at 35%? If I turn up the intensity I notice more Zoanthids are not opening as much.
I am going to shorten the photoperiod, but is it really possible that 35% is over doing it?

TIA

 

[exnisstech]

Here's a bump for you. I think I shared my settings which are much higher with you in another thread.