haha naw i get what your saying now, in my grow cab, the inside is white, and i tapped two white trash bags together and hung it down where it opens, on side its layered with duct tape to block light comin out, and on the inside is where the white part is, it reflects the light back to the plants then on the outside i have two black sheets hanging down for it kind triple layered, kinda boxs in the heat, so its always warmed, oped like only 1 a day