4FT LED High Bay - 480W - Workshop High Bay Lights - Dimmable - 63,000 Lumens - (DLC+UL) - LED Linear Low Bay/High Bay provides a high lumen package at over 134lm/w. These are ideal for replacing metal halides or T8/T5 fluorescent fixtures. These fixtures provide high a long life and great color rendering. The LHB series comes in 4000K and 5000K color temperatures. Suggested mounting heights are between 15 - 25 feet. This high bay reduces energy up to 60%. With this improved lighting, there are no UV or IR in the beam and provide soft uniform lighting which is safe for the eyes. Moreover, these LED High Bays provide superior lighting without Flickering or Humming. Also, the output constant current lever can be adjusted through output cable with 1-10V. Our LED High Bay lights are Eco-Friendly which means there is NO Mercury. Furthermore, these fixtures come with a 5 year warranty. This fixture has the premium certifications for utility rebates around the nation. This fixture comes with the lens.