HID Ballast Kit, Lamp Type Metal Halide, Start Type Pulse, Lamp Watts 250, ANSI Code M138/M153, Input Watts 291, Input Voltage /277, Ballast Type Core and Coil, Ballast Family HID Magnetic, Number of Lamps 1, Min. Starting Temp. -20 Degrees F, 60 Hz, 2.5 Operating Amps @ 120V, 1.4 Operating Amps @ 208V, 1.3 Operating Amps @ 240V, 1.1 Operating Amps @ 277VInsulation Class HLength 4-3/4 In., Width 3-1/8 In., Height 4-7/16 In. Technical Specification Item HID Ballast Kit Lamp Type Metal Halide Start Type Pulse Lamp Watts 250 ANSI Code M138/M153 Input Watts 291 Input Voltage /277 Ballast Type Core and Coil Ballast Family HID Magnetic Number of Lamps 1 Min. Starting Temp. -20 Degrees F Hz 60 Operating Amps @ 120V 2.5 Operating Amps @ 208V 1.4 Operating Amps @ 240V 1.3 Operating Amps @ 277V 1.1 Insulation Class H Length 4-3/4 Width 3-1/8 Height 4-7/16 Includes Capacitor, Core, Coil, Ignitor, Mounting Bracket, Hardware Additional Information HID Core and Coil Ballast Kits Ballasts are vacuum impregnated to help eliminate premature failure and voltage breakdown, for longer life and quieter operation. No live parts for safety. Use only capacitor and ignitor included with kit. To ensure compatibility, replace all ballast components when repairing an HID fixture. Match the ANSI code on the ballast being replaced, or on the lamp in the fixture to assure compatibility. Contain everything required to service HID fixtures: ballast, capacitor, ignitor (where required), clamps, and mounting hardware Ballast kits are compatible with most fixture designs