Fluorescent Ballast HID

Fluorescent Ballast
In a fluorescent lighting system, the ballast regulates the current to the lamps and provides a sufficient voltage to start the lamps. Without a ballast to limit its current, a fluorescent lamp connected directly to a high voltage power source would rapidly and uncontrollably increase its current draw. During the lamp starting, the ballast must briefly supply high voltage to establish an arc between the two lamp electrodes.

HID
High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp, which produces light by means of an electric arc between tungsten electrodes, housed inside a translucent or transparent fused quartz or fused alumina arc tube.