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A lamp is a replaceable component that produces light from electricity.〔(【引用サイトリンク】title=Lamp )〕 Compact lamps are commonly called light bulbs; for example, the incandescent light bulb. Lamps usually have a base made of ceramic, metal, glass or plastic, which secures the lamp in the socket of a light fixture. The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap. ==Types== There are several types of lamp: *Incandescent lamp, a heated filament inside a glass envelope * *Halogen lamps use a fused quartz envelope, filled with halogen gas *LED lamp, a solid-state lamp that uses light-emitting diodes (LEDs) as the source of light *Arc lamp * *Xenon arc lamp * *Mercury-xenon arc lamp * *Ultra-high-performance lamp, an ultra-high-pressure mercury-vapor arc lamp for use in projectors * *Metal-halide lamp *Gas-discharge lamp, a light source that generates light by sending an electrical discharge through an ionized gas * *Fluorescent lamp * * *Compact fluorescent lamp, a fluorescent lamp designed to replace an incandescent lamp * *Neon lamp * *Mercury-vapor lamp * *Sodium-vapor lamp * *Sulfur lamp * *Electrodeless lamp, a gas discharge lamp in which the power is transferred from outside the bulb to inside via electromagnetic fields 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lamp (electrical component)」の詳細全文を読む スポンサード リンク
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