High-pressure sodium lamp(redirected from Sodium vapor lamp)
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High-pressure sodium lamp
Among the most efficient sources of light; used primarily for exterior street lighting. The color rendition is similar to incandescent lamps.
high-pressure sodium lamp
A sodium-vapor lamp in which the partial pressure of the vapor during operation is about 0.1 atmosphere; produces a yellowish light having a wide spectrum, in contrast to the light produced at low pressures, which is characterized by sodium emission lines.