this would depend on how much florecent lighting. My LFS's softie tank is under 120 watts of NO in a tank about 18-20 inches high. If ionly had this lighting, i would not feel completly comfortable keeping corals, but it is possible for them to do it if you have enough. How many watts of NO do you have? If i were you, i would jsut wait. It couldnt hurt waiting, might help. JMO
What kind of flourecents. If you have pc's, vho's, or T-5's, then no problem. If they are NO, then unless under a bunch of tubes, I wouldn't. I personally wouldn't anyway. If you are getting new lights soon, then I would wait. JMHO