This 1×4 LED back-light design features three color selectable operation. Switch between 3500K, 4000K and 5000K easily at the time installation. This 1×4 panel provides high energy-efficient direct illumination and delivers 4200 lumens using only 40 watts to replace troffer and panel fixtures ceiling applications. The lightweight housing and slim design, measures only 1.5 inches in depth. The integral j-box and driver housing provide ample access for easy installation. The fixture is constructed using stamped steel back plate that provides excellent LED cooling as well as contributing rigidity to the design. The interior of the fixture is highly reflective white powder coated. The direct illumination panel is ideal for use in offices, schools, healthcare facilities and other commercial applications. DLC® rated product.