Lithonia Lighting STL Series Volumetric 53.2-Watt LED surface fixture in white polyester powder coated finish, features code-gauge steel construction. This fixture has 82 CRI 6000-Lumen 4000K LED lamp that has voltage rating of 120 - 277-Volts. It measures 48-Inch x 10-1/8-Inch x 3-7/8-Inch. This fixture incorporates Optional nLight® embedded controls continuously monitor system performance. It has average life span of 60000 hours. This fixture is suitable for general ambient lighting applications. Fixture is CSA certified to meet US and Canadian standards and DLC qualified.