The FCSL407 step light is U.L. listed for interior and exterior wet locations. Its unique design has a 316 stainless steel faceplate. The housing is marine grade, corrosion resistant, heavy walled, high pressure die cast aluminum construction with (2) 7/8″ KO. The lens is 1/8” thick tempered, opal. Precision formed semi-specular aluminum for maximum reflectance. Choose the elegance and longevity of stainless steel for your next step light project.