The Mercmaster III series provides a wide selection of high quality enclosed and gasketed luminaires for use in demanding industrial environments and hazardous locations|The 400 series is ideal for industrial environments and wet locations where a medium to high mounting height is required|Epoxy powder coat finish electrostatically applied for complete uniform corrosion protection|Hinge has high lip for added safety during installation and servicing|Hinge and bolt construction ensures 360 DEG compression at all points on ballast housing gasket for positive sealing|Swing away design of captive bolt and nut simplifies servicing|Wide choice of photometric distributions|Mogul base porcelain socket with nickel plated contacts has 200 deg C welded leads, prewired to the ballast to ensure trouble free operation in high ambient temperatures|One-piece ballast housing for each component provides even heat dissipation for cooler operation and longer ballast life|All Mercmaster III mounting hoods have provision for easy field installation of fuses in fixtures