HPSL (high pressure sodium lamp)

- Jan 09, 2020-

High - pressure sodium lamps require a corresponding ballast.


Structure

The arc tube of high pressure sodium lamp is made of translucent and slender polycrystalline alumina (PCA) ceramic, which can withstand higher operating temperature, resist high temperature sodium corrosion, and reduce the self-absorption loss of light radiation.High pressure sodium lamp mainly USES E27 and E40 screw cap.Small power white light high pressure sodium lamp with special two - pin lamp holder for accurate focus in reflector.

Type and work characteristics

High pressure sodium lamps are usually operated by inductive ballasts.The luminescence characteristic of high pressure sodium lamp is related to sodium vapor in lamp.Standard high pressure sodium lamp is working in the lamp sodium vapor is about 10 kPa, the light is golden yellow, color temperature is 1950 K, color index Ra=23.Two new high - pressure sodium lamps were developed by increasing sodium vapor pressure.One is the color improvement type, the other is the white light high-pressure sodium lamp.The vapor pressure of sodium in the former lamp is 40 kPa, the color temperature rises to 2200 K, and the color rendering index Ra=60.The vapor pressure of sodium in the latter lamp is 95 kPa, the color temperature rises to 2500 K, and the color rendering index Ra=85.However, compared with the standard high pressure sodium lamps, their light efficiency significantly decreased.