Thank you everyone,
I Had a 4 x 96 watt on a 75 gallon reef and the PC worked but, my zoas weren't as colorful as I liked. I have since turn that into a FOWLR, but miss the zoa's. so I'm setting up a the 30 gallon for a few fish and the zoa's a friend of mine just gave me the 2 x 65 watt light, so I thought maybe I can get a way with it, but like hrstrnr mention is the mounting, but I might use a glass canopy.
I'll probably just start with that and keep my eyes open for a 4 x 39 teklight, is that a good light?