Hubbell Outdoor Lighting PGM3150S18BZ 150-watt High Pressure Sodium Wallpack with Glass Refractor and Quad-Tap Ballast, Bronze Cast aluminum door with borosilicate glass refractor. Bottom hinge allows door removal. Twin HubbellGard screw closure for positive seal. Cast aluminum back housing provides firm mounting and heat dissipation. Specular, anodized aluminum reflector panels for vertical lamp provide high performance. Typical spacing is 4-6 times mounting height.