... filament can be used in energy-saving lamp, it is uniformity in pitch,shape,color, luster and piece weight,long life. ... used in general incandescent lamp, energy-saving lamp, fluorescent lamp, auto lamp, halogen lamp and other special lamp.Based on advanced ... 250V3) Main-supplementary coil: 110V-250V Features:1) Uniformity in pitch, shape, color, luster and piece weight2) High lighting efficiency3) ...