I guess 2 t-5 would work depending on how wide the tank will be, pretty sure its 12 inches if standard correct me if im wrong? the fixture itself is around 10 inches wide. If you want bright coloured zoas and lps and softies I'm sure you can get away from 2 t-5s however you wouldnt get much of a choice with spectrum because of the minimiumness of bulbs. Just make sure they are HO and not regular t-5s. I think 4 would be even better for corals however 2 will definitely be sufficient as long as they got individual reflectors. Stay away from PCs IMO they are expensive to replace bulbs. Also they produce a lot of heat and definitely lacks in bulb selection and life compared to t-5s. Thanks
Stanley,
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