I can't speak from experience about sps using NO fluorescent lights, such as the triton and blue moon, but I can say I did have sps that grew reasonably and maintained color well in a 29 gallon tank with 4 VHO fluorescents. I kept them very high in the tank, though.
I have since jumped on the MH bandwagon (I have 3 250 watt
double-ended bulbs as well as 4 VHO actinic over a 75 gallon and the growth is MUCH faster for the sps, even the couple I have down near the bottom of the tank. Colors seem to jump out a little more, too. And don't forget the cool rippling effect from MH bulbs because they are a point source of light!!!
Can it be done with just fluorescents? Probably yes, as long as you have quite a few tubes and keep the light-demanding corals very high in the water column. GARF only has them a few inches from the top of the water in their prop systems, I believe.
James



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