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there are a few things. you usually want more air coming in then going out. maybe a 4" exhaust with the 6" in. how tall do you want your plants to be? 60-16 for the bottom chamber makes 44 - 15 for the space you need between the lights and the tops that makes 29". minus the space for the growing medium and the actual dimensions of the light, you dont got much room. just make a separate cabinet for clones and veg.
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