Appleton Mercmaster Jr. Unilets HID Luminaire, Fixture Type: Pendant (Rigid Or Flexible Mounting), Lamp Type: 150 WTT S55 Medium High Pressure Sodium, Lamp Wattage: 150 WTT, Voltage Rating: 120 V, Number Of Lamps: 1, Material: Copperfree (4/10 Of 1 PCT Maximum) Aluminum Ballast Body And Mounting Hood, Fixture Wattage: 170 WTT, Amperage Rating: 1.7 AMP Starting, 1.5 AMP Operating, Housing Finish: Epoxy Powder Coat, Housing Material: Copperfree (4/10 Of 1 PCT Maximum) Aluminum, Ambient Temperature Range: 25 DEG C, Temperature Range: 261 - 280 DEG C, Ballast Type: High Reactance High Power Factor Autotransformer (HX-HPF), Ballast Quantity: 1, Reflector/Refractor: Heat-Resistant Prismatic Glass Refractor, Hub Size: 3/4 IN, Number Of Hubs: 1, Frequency: 60 HZ, Standard: Class I, Division 2, Groups A, B, C, D, UL 1598, 1598A, 844, E10444, For Use In Hazardous Locations, Enclosed And Gasketed Hid Lighting Fixtures For Use In Tunnels, Walkways, Bridges, Storage Facilities, Processing Plants, Parking Lots, Foundries, Manufacturing Plants, Power Plants And Other Locations Subject To Moisture, Dirt, Dust Or Corrosive Atmospheres