TDB Dusk-to-Dawn area lighters for lighting yards and parking lots, service roads and building perimeters. Rugged, die-cast, aluminum head with standard NEMA photocell receptacle. Formed aluminum reflectors and open bottom refractor for easy maintenance and lamp replacement. Optical assembly attaches via two tool-less toggle latches. Prismatic acrylic refractor provides uniform symmetrical Type V distribution. Glass for 250MV. Installation 1-1/4 (OD) mounting arm and all mounting hardware is included in carton. Photocell and lamp are included in carton. (24 mounting arm). Standard product is NOT Listed by UL, CSA or NOM, consult factory.