LDB-L Constant Current DC-DC Power Supply MEAN WELL LDB-L Constant Current DC-DC Power Supply features a buck-boost design and is available with a 500mA current rating. The module offers a wide input / output range. With a built-in EMI filter, the power supply complies with EN55015 lighting standards without the need for additional external anti-electromagnetic components. Applications for MEAN WELL LDB-L Constant Current DC-DC Power Supply include street lighting, landscape lighting, tunnel lighting, household lighting, and backlighting.