<P> An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated to such a high temperature that it glows with visible light (incandescence). The filament, heated by passing an electric current through it, is protected from oxidation with a glass or fused quartz bulb that is filled with inert gas or evacuated . In a halogen lamp, filament evaporation is slowed by a chemical process that redeposits metal vapor onto the filament, extending its life . The light bulb is supplied with electric current by feed - through terminals or wires embedded in the glass . Most bulbs are used in a socket which provides mechanical support and electrical connections . </P> <P> Incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts . They require no external regulating equipment, have low manufacturing costs, and work equally well on either alternating current or direct current . As a result, the incandescent lamp is widely used in household and commercial lighting, for portable lighting such as table lamps, car headlamps, and flashlights, and for decorative and advertising lighting . </P>

What is the name of the wire inside a bulb