What is the function of a ballast in a fluorescent lamp?

A ballast is essential in the operation of a fluorescent lamp because it regulates the current flowing through the lamp. When the fluorescent lamp is first turned on, the ballast provides the necessary surge of voltage to initiate the lighting process. Once the lamp is lit, the ballast maintains a stable electric current to ensure optimal performance and prevent flickering or dimming. This control over current is crucial, as fluorescent lamps require a specific range of voltage and current to operate efficiently without overheating or burning out prematurely. The function of the ballast not only contributes to the longevity of the lamp but also enhances overall energy efficiency in lighting applications.