hours of lighting?

[marki24]

i have t5's and i wanted to how many hours of lighting would i need for my corals. I have been doing 12 hours but i heard some member say it was too much. Should i decrease to 8 hours a day?

 

[alfani]

i have t5, kept it for 9 hours

 

[home wrecker]

i do 6hrs daylight an 10hrs actinic

 

[PalmTree]

I do 5 hours of 10Ks and 7 hours of actinics