If you want to save money on electrical cost and not having to run a chiller, then go with T5's.
I have a 210rr and use 250w and 400w MH, supplemented by 2 110W VHO with a remote basement sump. I do not need a chiller nad my temp has never gone above 80F. I chose the 250w and 400w mh because I have sps and did not want to spend the money up front for LED's.
-Steve
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