it all depends on what coral you want I can't put my brains or shrooms in my 35 because I'm trying to make a sps tank but it's more about the flow than light (flow for the breans light for the shrooms) for me but in a sps the more light and flow you have the better just make caves for your "low light" things but if you think about it you can always make less light in spots but you need new lights for more so imho your set