The Panda Film Waterproof Black & White 10' x 50' offers dependable light control and moisture protection for hydroponic grow spaces. This 5.5 mil polyethylene film is designed with a white side that reflects light back toward plants to support even light distribution and a black side that blocks light to help reduce algae growth and light penetration. The waterproof construction make... https://www.hydroponicstown.com/811150-black-white-film-10-x50-5-5mil