The L.T.F. DA18W400C2545 is a 18w 400mA constant current LED driver. It has a voltage range of 25 - 45Vdc and operates on 120Vac. The L.T.F. DA18W400C2545 is also ELV and Triac dimmable. Also, available is the DE18W400C2545 277Vac version and the DU18W400C2545 220-240Vac version.