Sealed room cooling question

outside intake>fan>ducting>lights>ducting>carbon filter>outside exhaust.

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i put my carbons inside a larger duct and seal them making them inline. i think u can buy them like this now too.
Intake filter>duct>lights>inline carbon>fan>backdraft damper>exhaust

Anyone ever use these?

not sure wouldnt that pump humidity into the air like crazy. like putting a swamp cooler in the room?

oh thats just used to cool the lights. well if you vent your lights you better have cool tubes because im finding most hoods have air leaks.

Idk I've never used them. I was going to have one for my lights running straight through and out the room. Then have another pulling air out the room through that radiator and back in the room, c shaped ducked keeping it a closed system. How bad do they effect the humidity?