I have a 400w mh inside a canopy on mine. + some supplimental lighting. Where I live it gets well over 100 every summer (its been 110 here before). We keep it at 70 with the A.C. tho. I dont have any temp issues whatsoever. with your lighting, I cant think you will either, unless you dont have a.c. I would use the money for the chiller on a sump and a better skimmer.
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Broke Back Mountain is not a movie, its the pile of dead ninjas in Chuck Norris' back yard
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