A compact fluorescent ballast is an electrical device used to regulate and control the flow of electrical current to a compact fluorescent lamp (CFL). Compact fluorescent lamps are a type of energy-efficient lighting that use a combination of phosphors and mercury vapor to produce visible light.

The ballast performs several functions in the operation of a compact fluorescent lamp:

Starting: Compact fluorescent lamps require a high voltage to start the lamp and establish the electrical arc. The ballast provides the initial high voltage necessary to strike the arc and initiate lamp operation. This is typically achieved through electronic circuitry within the ballast.

Voltage Regulation: Once the lamp is started, the ballast regulates the voltage across the lamp to maintain a stable discharge. The ballast ensures that the lamp operates within the specified voltage range to produce consistent light output and extend the lamp's lifespan.

Current Regulation: The ballast also controls the current flowing through the lamp. It limits and stabilizes the current to prevent excessive power consumption and to protect the lamp from overheating. Compact fluorescent lamps require a specific current to operate optimally, and the ballast ensures that the lamp receives the correct current.

Power Factor Correction: Many compact fluorescent ballasts incorporate power factor correction (PFC) circuitry to improve energy efficiency. PFC aligns the phase relationship between the voltage and current, reducing reactive power and improving the overall power factor of the system. This helps to minimize power wastage and ensures efficient operation of the lamp.

Compact fluorescent ballasts are primarily electronic ballasts, which utilize solid-state components and advanced circuitry for efficient lamp operation. They are typically smaller in size compared to traditional magnetic ballasts.

When selecting a compact fluorescent ballast, it is essential to ensure compatibility with the specific CFL you are using. Ballasts are typically designed for specific lamp wattages and types, so choosing a matching ballast is crucial for proper lamp performance and longevity.