ok..ive got a feeling u guys are gonna tell me the plant needs to breath.
if that is the case and i have slits in the lightproof sheet to go over a rim above the 6 vent holes at the bottom..this means that my plants will NOT be getting total darkness for the 18/6 and 12/12 cycles.

any cool DIY ideas if u guys think it is disasterous that i cover my cuboard on the inside with light proof material,

thnx guys