Lighting Timer

[Crowned_Sock]

I have a Nicrew Navareef 65 watt and I was wondering what the best amount of time to leave it on is? Right now I have it running on a 10 timer from 8am-6pm with 30 minutes of ramp up and ramp down, so 9 hours of full light.

 

[Mr. Mojo Rising]

If there are no corals then it doesn't matter, but if you have photosynthetic corals then I feel 8 hours would be the minimum. I give my corals 11 hours of peak lighting.