Stoncos Wallprism is ideal for security, accent and perimeter lighting. Applications include entrance ways, garages, tunnels, overpasses and alleys. Pateneted catadioptic refractor redirects light to minimize glare, aligns optical center of lens and lamp for symmetrical light distribution. Features: Heat and shock resistant borosilicate glass refractor, bonded to lens frame; Stainless steel aircraft cable safely retains lens frame to back plate freeing both hands for servicing; Precision die-cast aluminum, Duraplex II bronze finish, back plate with cast-in knockouts for alignment with all standard recessed boxes; One-tapped holes (1/2 inch NPS) on each side and top for conduit or photocontrol, complete with closure plugs; Deluxe glazed porcelain socket pulse rated for 4kV. Lamp not included.