Durable Black and White Poly improves light efficiency in indoor gardens. The white surface reflects 90 percent of light back to the plant canopy while the black surface prevents light from escaping. Double it up with the black surfaces together to economically and effectively partition off indoor garden rooms. Heavy-duty, waterproof Black and White Poly is UV-stabilized, 5.5-mil polyethylene film.
10' x 100' Black & White Poly Roll. The black side prevents light penetration and algae or weed growth while retaining heat. The waterproof white side reflects up to 90% of the light and can be used to partition areas. 6 mil. thick.