With your current lighting you can keep button polyps, mushrooms, some frilly mushrooms, green star polyps, and kenya tree.
With a 2 bulb 2x39w HO with rolled reflectors and your marine glow you can keep all of the above and possibly some cap, plate, maybe a less demanding LPS or two. Colt, Sinularia. Personally, pom pom, or pulsing xenia I think would be fine. Cespitularia(blue xenia) and Anthelia would most likely struggle.
With a 4x39w HO T5 fixture, with individual reflectors, as others have suggested, you can keep Anything you want. Toadstools, Nepthia, Fiji Leather, all LPS(appropriate of course), SPS(appropriate of course), Clams(high up only), and smaller anemones...Sebae, BTAs etc. The only thing I wouldn't recommend keeping with this lighting would be some deep water SPS and certain anemones, like Gigantea- which is 100% inappropriate for your tank anyway. Also if you happened to choose a Crocea clam, only high up under all 4 bulbs with an eye to any pigment loss.
Hope this helps.