I am setting up a reef tank (my first). I like the looks of clams and would like to have one or two. The light that I have for my 55 gal will be enough for them, not sure what kind I would get. The light I have are 2 150hqi's with 2 55 watt pc antics. Curently I don't have any water in the tank just getting info for the future. Thanks for any insite that you could give.