The Mean Well HLG-150H-42 is a high efficiency, constant voltage LED driver with a maximum output of 150 Watts. It is a highly reliable, dimmable power source that uses advanced technology to boost power efficiency up to 95%. The HLG-150H-42 is single output with a voltage output range of 40V to 57V DC, and a maximum current rating of 3.8A (42V). It has built-in active PFC and protections against short circuit, overvoltage, and over temperature. It also features a 0%-100% adjustability for dimmable applications.