Mylar 98% reflective film and black and white 90% reflective poly sheets captures light that would normally be lost and reflects it back onto the plants. Line your custom built grow room walls with highly reflective material and increase both vertical and horizontal light reflection.
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$54.99Panda Black and White Poly Film 100FTx10FTx5.5mil
$8.99Tarp Zip Up Peel and Stick Zipper System