Hi,
I have been talking to Bang Guy, my book has some low light corals, and the non-photosynthetic sun coral listed under "HARD CORALS" I just assumed that meant SPS, he says he has never seen low light SPS and that's why he asked. So it looks like SPS corals are all light hungry and you need really strong lighting to keep them. I mean strong like anemone light needs.
There are some really beautiful non-photosynthetic corals and all brightly colored, the soft corals have a more fleshy appearance. So it isn't like you can't have some beautiful colors, but SPS seems to be out unless you upgrade your lighting system. Sorry to have misled you. That's one reason why I love this site, if we drop the ball somebody is right there to help us get the facts straight.