A friend of mine keeps many SPS and a clam successfully under (2) 65 watt PCs: one 10,000 K and one actinic 03 460 nm. The colors are good, but he has said himself that the colors of the mother colonies he got them from were much more intense under metal halides. He has grown all of these SPS corals from one inch frags over several years. They are predominantly from the genus Montipora.
His 10 gal. nano tank:
as stated above, most montis will do fine given that the depth of a nano is very shallow. also, u will hv to add a powerhead to increase the flow for sps. as for acros, u will need to upgrade the light to t5 or mh if u decent growth in a nano.
I know my buddy has at least 750 GPH of turnover in that tank - he may even have another powerhead behind the rockwork on the left pushing another 250 GPH.