Description Reliable, Stable Grow Environment: Grow conditions outdoors are unstable and unpredictable; In VIVOSUN 2-in-1 9×4 Grow Tent, however, you have control of light, temperature, humidity, and soil conditions so you can tailor everything to your plant's specific needs, keep your garden safe from noisy neighbors, pesky pets, and cankerous critters, ensuring maximum results Low Costs & High Efficiency: VIVOSUN VS4000 LED grow light uses Samsung LM301 diodes & brand driver for high energy efficiency with 2.9 μmol/J; Extremely high output but consumes only 400W of electricity Convenient Dimmable Lights: This LED grow light has a dimming knob & ballast, so it adapts to different plant growth stages by adjusting its output from 40% to 100% Perfect Combination: Three-part system includes every part you need to get set up; It is primarily used in various air circulation and ventilation projects to move and transport air Excellent Odor Control: The porous activated carbon with 1200 RC 412 Australia Virgin Charcoal helps eliminate some of the most undesirable, pungent smells and particulates for indoor grow tents