... bobbin coil for led lighting,coil with led light,bobbin core coil,transformer coil former 1.features: EFDtransformer for LED driver,magnetic ... transformer:Switching Transformer with 20 to 80kHz Frequency Range,switching power supply, PCB, STB and other communication and medical ... the range of power: (50W-1KW) 100 KHz cut down installation cubage with multi-plugs and bobbins, easily connection ...