Flat Core EM Ballast EF Series Watts: 4w,6w,7w,8w,9w,11w,13w available EEI: B2 CE,Nemko,SAA,Kema-Keur Magnetic Ballast Product Information Flat profile ballast for compact fluorescent lampsFlat core design: 26 x 28 mmSEED Design from GermanyMore than 15 years lifeVacuum impregnated using PE resinSpecifications Core: High Grade Silicon SteelWire: High Temperature ResistanceTerminals: Plug-in or ...