... for led lighting,coil with led light,bobbin core coil,transformer coil former 1.features: EFDtransformer for LED driver,magnetic transformer for led,12v transformer 110v for led,transformer for ... supply,main power transformer•EFD core : Auxiliary powr transformer,main power transformer,choke coils•EPC core :Auxiliary powr transformer,main power transformer•PQ core : applied ...