The HLG-40H-54 is part of Mean Well's driver series of LED power supplies. The HLG-40H-54 is designed to power low-voltage LED lights and operates in a temperature range of -30°C to +90°C. It has an efficiency rating of up to 94.2%, a power factor of over 0.95 and a minimum efficiency of 78%. It also has an output current of 5.4A, a maximum output power of 54W, and a wide input voltage range of 90- 305 VAC. The HLG-40H-54 is also highly reliable, backed by a 5-year warranty.