Durable GroXcess 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 GroXcess Black and White Poly is UV-stabilized, 5.5-mil polyethylene film.
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