Your coral is actually an A. sarmentosa.
I can personally say (with experience) that Acropora will not do very well under flourecent lighting. "Back in the day" I had kept at least 6 Acropora frags under 8x 65wt PC's and one 110wt VHO. This was all under an 80 gallon tank. Within two weeks all of the corals were completely brown-- including a formally pink S. hystrix. Luckily I had upgraded to 2x 400wt Radiums shortly after, otherwise most (if not all) of the corals would not be around anymore.
One coral in piticular that I would like to point out is an A. nana frag which I recieved back when I was still running power compacts. Most died within three weeks of being kept under PC's. I had no growth at all from the corals, despite the mild coralline growth. Now, almost two years later, the coral is over 5x5" and is bright green with purple tips.
The only coral that I was, however, able to keep was Hydnophora rigida. I had recieved a very small 1/2" frag in August of 2002. It stayed alive for 5 months before I upgraded to halides. However, it never grew at all.
Overall, if you want to keep SPS "Successfully," there's nothing better than MH. Occasionally, one person may have some success with keeping SPS under flourecent lighting, although these are the very few exceptions. It's like the lottery -- one person may win, while millions loose. Except in your case, the downside is much more than a dollar
Keep in mind that I'm only speaking from my experience. I'll try and upload a few pictures, if possible.
Take Care!
Graham