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yeah, but wont the carbon filter kill all the co2 that runs through it?

im thinking of starting a grow op where my hps lights will be chillin in air cooled vents. the air that runs through to cool my lights will never mix with the air in the actuall grow room. the reason for this is cuz im also going to be inducing CO2 into the room and i dont want my exhaust fan to...

so ive been studying up on cfl's for a minute now and it seems to me that the only problem is light penetration. if cfs have enough power to only penetrate 12 to 24 inches into the canopy, then why doesn't anybody place bulbs all around or even even straight through/underneath the plants to hit...