biggerbud420
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in designing my grow room I have come up with 2x4x6 space with a 600 watt viparspectra led light that is 260 actual watts white glossy stytrofoam insulatation board with the white glossy side facing grow room 4 inline exhaust fan with charcoal filter small fan timers humidity and temp readers and a 8 inch vent in the bottom too bring in fresh cool air . now my question what type of fabric could I use to cover the bottom vent to keep out light and let in air ?