LDH DC-DC Step-Up Constant Current LED Drivers MEAN WELL LDH DC-DC Step-Up Constant Current LED Drivers offer a 250mA to 1750mA current output range and up to 96% efficiency. These drives include to LDH-25, LDH-45, and LDH-65 series and feature short-circuit, overvoltage, and undervoltage protection. LDH drivers are fully encapsulated and feature cooling by free air convection. MEAN WELL LDH LED Drivers are ideal for portable lighting, LED solar street lighting, and LED greenhouse lighting.