Tungsten lamps

The perfection of the tungsten incandescent lamp as a highly efficient means of converting electrical energy into light has made it a subject of great commercial interest. The tungsten lamp has reached in a comparatively short time a most enviable position in the field of artificial illuminants. It has been developed for multiple use on commercial lighting circuits up to 260 volts, for series street lighting, for low voltage decorative, display and train lighting, and for many other purposes. Its commercial success in all these various applications bears witness to its merit as a convenient and efficient source of illumination and its production and characteristics are consequently worthy of consideration from an engineering standpoint.