Mercmaster Jr. Unilets Ballast Body, 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, Length: 7 IN, Width: 7 IN, Housing Finish: Epoxy Powder Coat, Housing Material: Copperfree (4/10 Of 1 PCT Maximum) Aluminum, Ambient Temperature Range: 25 DEG C, Temperature Range: 281 - 300 DEG C, Ballast Type: High Reactance High Power Factor Autotransformer (HX-HPF), Ballast Quantity: 1, Frequency: 60 HZ, Standard: UL 1598, 1598A, 844, E10444, For Use With Mounting Hoods Or Any V-51 Series Mounting Hood And With Refractor Or Globe
