grow lab horticultural grow room gl120l the grow lab gl120l is perfect for a veg room or medium sized flower room specifications perfect for holding one 3 x 6 tray this room works great with two 600 watt lighting systems material interior reflective silver film exterior waterproof black canvas recommended lighting 400 or 600 watt hps or mh system dimensions assembled 311 wide x 711 deep x 67 tall 47 x 94 4 x 78 75 tall 240 x 120 x 200cm packed 4 wide x 1 2 deep