Mercmaster Iii Ml Series Ballast Body, Lamp Type: 100 Wtt 9500 Lm Medium High Pressure Sodium, Lamp Wattage: 100 Wtt, Voltage Rating: 120/208/240/277 V, Number of Lamps: 1, Material: Cast Copperfree (4/10 Of 1 Pct Maximum) Aluminum Moun T Maximum) Aluminum, Ambient Temperature Range: 65 Deg C, Temperature Range: 90 Deg C Supply Wire, Ballast Type: High Reactance High Power Factor Autotransformer (hx-hpf), Ballast Quantity: 1, Frequency Rating: 60 Hz, Enclosure: Nema 4x, Ip66, Standard: Class I, Division 2, Groups A, B, C, D; Class I, Zone 2, Aex Na Nr Iic (z2); Classi, Zone 2, Ex Nr Iic (z); Class I, Zone 2, Aex Nr Iic (zb); Class Ii, Division 1 and 2, Groups E, F, G; Class Iii; Ul 1598a, 60079-15, 844; Csa Lr25428, For Globe