Mean well lpf series led power supplies constant voltage and current mean well lpf 40 12 a 12v 40w led driverpower supply that comes in a plastic case the psu features an active pfc function and constant voltage and constant current modes a universal input high efficiency and fanless design makes this led driver suitable for use in led applications such as downlights spotlights decorative lighting tunnel lighting etc meanwell lpf 40 12 constant voltage amp constant current led psu