general rule is 3500 btu's for each 1k of light plus 20 btu x sq ft

so 3500 x 4 = 14,000 btu + 10 x 10 = 100 x 20 = 2000 btu + 14,000 =

total = 16,000 btu

and i think thats without aircooled lights, so maybe you could get away with a little less, but deff need more than a 9000 btu portable, and make sure you get a good quality one so it lives up to its tru btu's as advertised.

Do you have Co2? you could get away with higher temps, but still would need an a/c, dehumid, since it would be an enclosed environment, but maybe could get away with a smaller a/c
gsxxer Reviewed by gsxxer on . How big air-conditioner do I need? Does anybody know what size air-conditioner I need to cool a 10 x 10 x 7 room (700 cubic ft.) with 4 1000W lights? The rest of house is about 86 degrees to start with (at the time of night when lights are on, due to house walls radiating the heat theyâ??ve absorbed during the day). The lights are air-cooled, but still put off a good amount of heat anyway (a 750 cfm fan pulls air thru them, either fans getting old or the outside/intake air isn't cold enough). I was going to buy a 9000 BTU Rating: 5