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Old March 29, 2018   #5
Cole_Robbie
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Join Date: Jun 2012
Location: Illinois, zone 6
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You can make it as nice as you like. Just stapling up plastic or a tarp will help. Or if you want to put a little more into it, foil-faced styrofoam insulation sheets make great boxes. I have used foil furnace tape to hold them together. The tape is even strong enough to make hinges, if you just tape a panel on one edge.

A styrofoam box would hold heat very well, enough that the LEDs should make it as warm as you like. Since you have a temp controller, you could wire that to an exhaust fan up top, so that you vent when it gets hot. You'll need a fresh air exchange every so often anyway. You would want a passive intake at the bottom, like a dryer vent turned backwards.
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