I rely soley on a T5 fixture to light my 90 gallon SPS reef. After switching from metal halides, I haven't noticed any adverse effects and most of my acros are improving in colour since I made the switch. Like the previous posts stated, so long as the fixture has individual reflectors you should be able to keep any type of SPS coral. Active cooling makes a big difference as well and improves light output and bulb longevity.
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Do or do not....there is no try.
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