yourkiddin
420 Member
I make a new grow box 3x3x6. I used the foam board insulation and the shiny side is facing in. I'm wondering if that's enough or should I put mylar film on the inside? I seen a comment somewhere that the dull side of aluminum foil reflects more light than the shiny side.which is hard for me to believe. To me the foam board shine is kinda dull.