If you want "corals" under lower lighting, Xenia, mushrooms, hardier zoanthids, some sun corals, etc. can usually do quite well. You'll have to stick mainly to softies though.
I have mushrooms under NO flourescent and they've tripled in size since I placed them in the tank and are fully open. Nice coloration, etc. and easy to care for.
Also, some sponges are quite easy to care for. I have some in my seahorse tank that I absolutely hate, and they can survive through anything.