DLE60PS12 LED Driver, Constant Voltage & Current, 50 W, 12 V, 4.2 A.  LED Power Supply incorporates universal input with active power factor correction in a two power stage design, eliminating flicker while providing a high efficiency solution. Designed as a class II isolation product, without the need for a safety earth, DLE series LED drivers are also approved as a class 2 limited power sources, making them suitable for a wide range of applications. Dimmable constant current versions are available with the facility for PWM, voltage and resistance programming.