Corals need a certain amount of intensity, a single a360x is lighting my 54 gallon corner tank and growing sps.... so a 30 gallon should be no problem for it. I've never recommended longer than a 12 hour photo period honestly. And you do have it mounted pretty close to the waterline at 5 1/2".... If it were me I would make some sacrifices somewhere in the best interest of my critters...Even if as low as 20%?