It is a Galaxy pro-
30 Gallon Nano.
I have a few different types of coral and put them in the tank either low or high depending on their light requirements.
Here is a pic....
Wow- super blue crappy pic, but you get the idea. [emoji12]
Do you keep any sps? I can't tell but being a tall tank I would try 12 in. at first starting low on the intensity and gradually increasing it to desired level.
I agree. Go slow with the amount of lighting until the corals give you a sense of whether they need more or less light. Lower is more intense, higher is better spread so a lot depends on tank size and type of light. From your picture it looks like you have a good starting point.