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how much do they help with the heat? i have 2 600w halide and 2 600w sodium lights (for both stages) will an impeller fan next to the cool tubes and another fan to bring frsh air into the room, also a minor fan to blow around air be adequate? also what are better ways to deal with heat?

hey im looking for some exert veterans who could give me some good advice,, here's a list of what i have so far, i got a large box........ 170cm in length 205cm in height and 105cm in width looking to use around 25-30 pots and have 2 600w halide & 2 600w sodium lights (for both stages) any...