HID lamps produce light by an arc discharge between two electrodes at opposite ends of an arc tube. This light is produced by current passing through a vapor at relatively high pressure in contrast to extremely low pressure as with fluorescent lamps. The function of HID ballast is to control the starting current, operating current and voltage necessary to initiate and sustain the arc.

Robertson Worldwide carries a broad line of ballasts for most HID lamp types including Metal Halide, High Pressure Sodium, Low Pressure Sodium, and Mercury Vapor Cooler-Running HID Ballasts. We have recently expanded our HID line to include some of the coolest-running quad-tap ballasts available. Low temperature rise and low watt loss give you unmatched versatility. Compare our ballasts' UL Benchtop Rise Temperature Codes to those of our competitors.