I have a slightly different view. Your lighting may be enough to keep several sps alive even some acropora. The problem would be that it would never be the same color that you are seeing in pictures from some of the guys tanks. And in fact if you took a colorfull frag of an acro out of my tank with my lights or someone elses with a lot of light and put it into yours, it probably would die from the extreme change in loss of par. If you were lucky it would turn brown or green and then at some point down the road if it was otherwise healthy and growing it might color up into something. If you could get the water conditions very good, you might get them acclimated to your lights and they might be very healthy, but IMO you would never see the colors that you see in tanks with metal halides. Not with the amount of light you have presently. You could certainly start with some montiporas and see how they go.
