Intended Use: For entrances, loading docks, walkways and vehicle ramps. Not recommended for applications with frequent exposure to harsh chemicals or commercial cleaning fluids (e.g., car washes). Installations in such environments may lead to premature failure of the luminaire and void the warranty.Housing: Rear housing is rugged, die-cast aluminum. Corrosion-resistant, captive external hardware includes slotted hex-head and tamperproof fasteners. Finish is dark bronze (DDB) corrosion-resistant polyester powder.Ballast: All ballasts are 100% factory tested. High reactance, high power factor for 150W and below. Constant wattage autotransformer for 175W. MH: 150W and below are standard with pulse-start ignitor technology. CSA, NOM or INTL required for probe start shipments outside the U.S. for 175M. Not available in 175M with SCWA. Compact fluorescent uses an electronic high-frequency ballast.Socket: Glazed porcelain medium based (mogul based 175W), horizontally oriented with copper alloy, nickel-plated screw shell and center contact. UL Listed 660W, 600V for medium base; 1500W, 600V for mogul base. 4KV pulse rated. Fluorescent is four-pin positive latching thermoplastic. LPI is standard 35K for CFL.Installation: Top 3/4" threaded wiring access. Back access through 3/4" opening. For feed-thru wiring, use condulet tee (not included). Mount on any flat, non-combustible vertical surface.Listing: UL Listed (standard). CSA or NOM Certified (see Options). UL Listed for 25°C ambient and wet locations. IP65 rated.