Denver LED Direct introduces it’s HD Series Linear High Bays. They are great for factories, workshops, warehouses, gymnasiums, gas stations, supermarkets, stadiums, and wide open areas.  Each light has 135 lumens per watt and an output constant current lever can be adjusted through output cable with 1 - 10V.  Furthermore, these HD Series lights are UL and DLC listed, and come with a 5 year warranty. The HD Series Linear High Bay Lights provide a well-lit work area for needed safety and efficiency. There are also various installation methods which includes: Suspending Mounting, Ceiling Mounting and Free Parallel Combination Mounting. There are also optional wire guards that can be added for extra durability.