I made one box then another for flower when I needed it. Basic 2' deep 4' wide and about 4' tall. They are both full now and the veg cabinet will have to be a flower box too for a while. Cost $11 each, one sheet of OSB radiant barrier. So the cheap wafer board with foil glued onto one side. I use T5 lighting.

I don't know how you'd make it stealth though, may be a fancy paint job. I just have them in my garage.

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