Gotham Hydroponics Reflective Diamond Foil Film for Plants, 4 by 100-Feet 6 Mil Thick 48" Wide, 100' Long Features textured "diamond pressed" surface, reflects light and disperses it eliminating "hot spots" of light that is harmful to the health of plants Ideal for lining walls, ceilings and floors of a growing area in order to optimize light distribution and quality Waterproof film discourages algae and mold growth