光管,電燈泡和慳電膽運作原理有何不同?

Hi,
A fluorescent lamp or fluorescent tube is a gas-discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short-wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.


光管，或稱日光燈、螢光管，是一種照明裝置，使用電力在氬或氖氣中激活水銀蒸氣，形成等離子並發出短波紫外線，令磷質發出可見的螢光以照明。一般的螢光管以玻璃製造，在兩端裝有插口以連接電源及固定螢光管的位置。

與電燈泡不同，光管必須設有鎮流器（又稱為「安定器」）以控制進入螢光管的電流。一些小型的光管，鎮流器會被裝置在光管內，令它可以使用在傳統燈泡的燈頭插座上，又稱「節能燈泡」或「慳電膽」。
電燈泡:
The incandescent light bulb, incandescent lamp or incandescent light globe is a source of electric light that works by incandescence, (a general term for heat-driven light emissions which includes the simple case of black body radiation). An electric current passes through a thin filament, heating it until it produces light. The enclosing glass bulb prevents the oxygen in air from reaching the hot filament, which otherwise would be destroyed rapidly by oxidation. Incandescent bulbs are also sometimes called electric lamps, a term also applied to the original arc lamps.
Incandescent bulbs are made in a wide range of sizes and voltages, from 1.5 volts to about 300 volts.


Note:
A thin filament is also called a heat element.

Hope it helps.
Bye bye

慳電膽 CFL (Compact Fluorescent Lamp) 運作原理和光管一樣, 唯一不同之處是光管每秒閃爍100或50次, 易使眼晴疲勞。慳電膽每秒閃爍頻率達200-600次, 眼睛基本上感覺不到,所以不大傷神, 而且全電子化體積小。