Back مصباح بخار الصوديوم Arabic Натриева лампа Bulgarian Làmpada de vapor de sodi Catalan Sodíková výbojka Czech Natriumdampflampe German Λυχνία ατμών νατρίου Greek Lámpara de vapor de sodio Spanish Naatriumlamp Estonian لامپ بخار سدیم Persian Suurpainenatriumlamppu Finnish
A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.
Two varieties of such lamps exist: low pressure and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps, where they are widely used.[1] High-pressure sodium lamps emit a broader spectrum of light than the low-pressure lamps, but they still have poorer color rendering than other types of lamps.[2] Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night.
Single ended self-starting lamps are insulated with a mica disc and contained in a borosilicate glass gas discharge tube (arc tube) and a metal cap.[3][4] They include the sodium-vapor lamp that is the gas-discharge lamp in street lighting.[5][6][3][4]
- ^ Department of Public Works (1980). San Jose: Study and report on low-pressure sodium lighting. San Jose: City of San Jose. p. 8. Archived from the original on 2016-03-04. Retrieved 2013-12-06.
- ^ Luginbuhl, Christian B. "Low-Pressure Sodium Issues and FAQ". Flagstaff, Arizona: U.S. Naval Observatory. Archived from the original on 2015-09-10. Retrieved 2013-12-05.
- ^ a b "The Low Pressure Sodium Lamp".
- ^ a b "The Low Pressure Sodium Lamp".
- ^ "Lighting Comparison: LED vs High Pressure Sodium/Low Pressure Sodium". StouchLighting.com.
- ^ "The Sodium Lamp - How It Works and History". EdisonTechCenter.org.
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