For entrances, stairwells, corridors and other pedestrian areas. Construction: Cast aluminum backplate. Gasketing between backplate and front cover prevents the entry of water and contaminants. External hardware includes phillips head and tamper-proof hex-head fasteners. Finish: Dark bronze (DDB) or white (DWH) front cover available for all wattages. Optical system: Front cover/refractor is injection-molded, one-piece, UV-stabilized polycarbonate. The optical system is sealed and gasketed to inhibit the entrance of outside contaminants. Electrical system: The 13W fluorescent uses a 120V electro-magnetic ballast and includes a twin tube fluorescent lamp as standard. The 26/42W fluorescent uses a multivolt electronic ballast and offers the option of 120-277V operation and also the option of 26W, 32W or 42W triple tube fluorescent lamp (not included). Installation: Units are for wall mounting and include two 3/4 knockouts for routing electrical conduit. Listing: UL listed for wet locations. Listed and labeled to comply with Canadian Standards.