An LED driver is an electrical device that regulates the power supplied to LEDs (Light Emitting Diodes). It ensures that the LEDs receive a consistent voltage and current, which is essential for their optimal performance and longevity. Without a proper driver, LEDs can be damaged by fluctuations in power. LED drivers come in various types, including constant current and constant voltage drivers. Constant current drivers maintain a steady current flow, while constant voltage drivers provide a fixed voltage. Both types are crucial for different applications, ensuring that LED lighting systems operate efficiently and safely.