The L.T.F. DA18W440C1042BF is a 18w 440mA constant current LED driver. It is bottom feed without studs and has a voltage range of 10 - 40Vdc and operates on 120Vac. The L.T.F. DA18W440C1042BF is also ELV and Triac dimmable. Also, available is the DE18W440C1042BF 277Vac version and the DU18W440C1042BF 220-240Vac version.