i held on to my PC actinics for a long time, and when i finally switched over to T5 actinics, i kicked myself for waiting so long. the T5 bulbs supposedly last much longer and are visibly brighter than equal wattage PC. my coral colors greatly improved when i switched.

i have seen tanks with PC grow all kinds of corals, the only issue may be coloration and growthrate. both may be less than ideal with SPS corals.