Right lighting?

Jun 9, 2009
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#1
I'm planning on starting a small SW tank in 20 gallon long. I just recently purchased the Coralife NO T5 Fluorescent light. I would like to build up to full reef tank at some point. I think the T5 would be better then the metal halide due to the heating of water. Ya/Na

Any suggestions or would two Coralife NO T5 Fluorescent be better?