This Tridonic Compact Dimming Advanced series constant current LED driver has a selectable output current between 300 450 and 500mA a 21 Watt output power and 82% efficiency. Dimmable via leading edge and trailing edge phase dimmers with a dimming range between 5 and 100% this driver also provides a 50000 hour life-time and 5 year guarantee. It has been designed with a polycarbonate casing and offers overload short-circuit no-load and overtemperature protection alongside providing an IP20 level of protection against dust.