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My growbox temp is in the low to mid 90's with lights on and the door closed. -I have the day cycle switched to 8pm-8am. -I have two 10 fans inside the box circulating air. -1 bathroom exhaust fan at the top of the box venting hot air. -my hood is cooled by a 4" duct tapped into my a/c with a...

Currently started a box grow with a sun system large reflector. I am running a 400watt MH that is air cooled with a 4" fan. My questions are: Would there be a problem with cutting a hole directly opposite of the mh bulb and running a 70 hps, making two bulbs in the hood? Would it even help that...