... can be used in energy-saving lamp, it is uniformity in pitch,shape,color, luster and piece weight,long life. Tungsten filament ... , made by qualifed tungsten wire, are widely used in general incandescent lamp, energy-saving lamp, fluorescent lamp, auto lamp, halogen lamp and other special lamp ... weight: ±3%mg3) Cold resistance: ±3% ohm Energy-Saving Lamp Tungsten filament