What is the function of a ballast in electric discharge lights?

A ballast serves an essential function in electric discharge lights, specifically by limiting the current flowing through the lamp. In these types of lighting systems, such as fluorescent lamps or high-intensity discharge lights, the initial start-up phase requires a higher voltage to ignite the gas within the lamp. Once the gas is ionized and the lamp is lit, the ballast regulates the current, preventing it from exceeding safe levels. If the current were to rise unchecked, it could lead to overheating and damage to the lamp, or even create a fire hazard.

Understanding the role of the ballast is crucial for maintaining the efficiency and safety of electric discharge lighting systems. By managing the current effectively, the ballast ensures the lamp operates properly, extending its lifespan and optimizing performance.