298W 120/208/240/277V 2.5/1.45/1.25/1.1Amp Philips Advance Core And Coil Magnetic HID Ballast Kit, Black

The basic ballast is the open core and coil which is most often used as a component within a lighting luminaire. The core and coil also forms the nucleus of Philips Advance's five other ballast configurations.

Philips Advance HID ballasts are available to operate the wide variety of metal halide, high pressure sodium and low pressure sodium lamps available in today’s marketplace. Like fluorescent, HID lamps are gas discharge lamps. Light is produced by an arc discharge between two electrodes located at opposite ends of an arc tube within the lamp’s outer glass envelope. The ballast is the lamp’s power supply, its purpose is to provide proper starting and operating voltage and current to initiate and sustain this arc.