Constructed of a robust durable housing, high-transmittance PC diffusion cover, long-lasting led chips and energy-efficent LED driver, the commercial led high bay lighting fixtures ensure high performance for more than 50,000-hour of continuous use or 23-years when on every day for 6-hours/day. Up to 80% Energy Savings. The LED linear high bay light emits an extreme 45000 Lumens of premium LEDs with 3500K/4000K/5000K adjustable color temperature. This fixture providing a high efficient and uniform lighting, no UV or IR radiation, no hum, up to 80% energy saving. With an enclosed power supply and covered optics, the LED high bay lights are designed for durability in commercial/industrial applications. With a beam angle of 120°, high efficency, made them become a perfect solution for those commercial areas where need bright lighting, such as garages, warehouses, gyms, manufacturing space and large retail spaces. These high bay lights can be easily hung to the ceiling with the included chains and V-hooks. Color Temperature: 3,500K/4,000K/5,000K. Input Voltage: AC120-277V 50/60Hz. LED Type: SMD3030 LED chips with 150Lm/W. 1X 300W Adjustable Linear High Bay Light. KUKUPPO Founded in 2011. With over 3 million customers in more than 100 countries and regions around the world, partner and supplier to many power organizations. We are high-Technology company specialized in manufacture Commercial and industrial LED light. Advanced production equipment and Excellent R & D ability help us to combining Service, production, sell together provide top-level products to our customers. Mainly products LED Corn bulbs, LED retrofit kits, LED high bay fixture, LED Shoebox fixture, LED Barn Light, LED Temporary Work Light etc. All Series of innovative Energy Saving LED products for provide solutions of indoor and outdoor lighting. Safety certification UL? ETL and Energy certification DLC for rebate. KUKUPPO is set up warehouse in OH, TX and KY. We strive to ensure 100% satisfaction for each and every one of our customers. All of our products are one hundred percent brand new. Please inspect your order upon arrival for missing/incorrect items. Please messages us to notify us of any missing/incorrect item. Item may be return within the return period. Goods must also be in its original box and packing. Do not dispose of the box or any packaging materials until you are satisfied with the product. Office Time: 9:30 – 18:30, Monday – Saturday (UTC+8). We will respond you within. Your satisfaction is our pursuit. We really appreciate the chance to improve our service!