The MEAN WELL HLG-120H-30B is a high-quality AC/DC LED power supply that offers constant current and voltage output. With a power rating of 120W, this power supply is capable of delivering a fixed 30Vdc at 4,000mA. One of the notable features of the HLG-120H-30B is its dimming capabilities. It supports 1-10Vdc and PWM dimming methods, allowing for enhanced control and flexibility in lighting applications. Designed with reliability in mind, this power supply is built with high-efficiency components and features a compact design. It also comes with built-in protection features such as overvoltage, overcurrent, and short circuit protection to ensure the safety of your LED lighting system. The MEAN WELL HLG-120H-30B is an excellent choice for a wide range of LED lighting applications that require a constant current and voltage output with dimming functionality.