Tungsten Filament used in Incandescent lamp,GLS lamp,is uniformity in pitch,shape,color,luster and piece ... They are widely used in incandescent lamp, energy-saving lamp, auto lamp, halogen lamp,GLS lamp and other special lamp. Specifications:1) Single-coil: 36V ... -250V,1,000-5,000 hours2) Double-coil: 110V ...