electromagnetic ballast /magnetic ballast For FL15-40W / 100% COPPER wire,silicon steel / (H*W):29*41mm / CE standard ... ,36W,40W2.Voltage:220V,230V,240V3.Frequency: 50HZ,60HZ4.Material: 100%copper wire, good silicon steel5.Certificate:CE,TUV.Product Details ... in other types for fluorescent lamps:Why choose us ? Smart U ballast 40w