High-pressure sodium 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.
References in periodicals archive ?
Supply of (a) body (housing) for projectors equipped with high pressure sodium vapor 100 & 150 watt lamps, (b) 100 watt high pressure sodium vapor lamps with electronic controls equipped with E 40 basins & (c) 150 watt high pressure sodium vapor lamps with electronic controls equipped with E 40 basins.
Supply of lighting projectors complete with the operating device, also of 150 & 250 watt sodium vapor lamps.
Supply of (a) housings for lighting projectors of 100 & 150 watt high pressure sodium vapor lams, (b) 100 watt high pressure sodium vapor lamps with electronic stopper with E 40 base & (c) similar 150 watt high pressure sodium vapor lamps with E 40 bases.