KEEPS ALL LIGHT IN: The VIVOSUN grow tent blocks all light from escaping and is lined with 98%-reflective mylar to boost the output efficiency of any grow tent setup.Zipper with black lining create a light-proof seal without the need for additional flaps and Velcro. EXTRA-THICK CANVAS, STANDS STURDY: The top-quality 600D canvas is tear proof and double stitched for perfect light blocking; the canvas is supported by strong metal poles that are specially finished for smooth installation. 300W LED GROW LIGHT: VIVOSUN's full-spectrum 300W LEDs deliver optimal light-spectrum coverage, more power for bloom, maximum PAR output at various distances, and super-bright lights that your plants will love. EXCELLENT PENETRATION IN TENTS & GROW HOUSES: Floods 2ftx2fttargets in intense light for monstrous vegetative growth at height of 24 inches and 1.5frx1.5fr targets for incredible blooms at height of 18 inches that penetrate through your top canopy. FAST INSTALLATION: VIVOSUN grow tents and LED kit are easy to install even if you've never done something like this before: no tools needed!