The BarnGuard LED security lights feature high quality white light that makes them ideal for replacing the yellow light of HPS. And with up to 7,900 lumens there is enough light to replace up to 175 W Mercury Vapor luminaires while saving up to 80% in energy costs. With an expected service life of over 10-years, the BarnGuard LED is a true maintenance-free solution. The BarnGuard barn light is easy to install on an existing mast arm or directly to a wall or wooden pole. The included twist-lock photocell provides reliable dusk-to-dawn operation and the multi-volt electronics allows for 120-277 V operation.