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High pressure sodium lamp is a kind of high intensity gas discharge lamp.
the sodium element is a silver white metal, also known as sodium metal. The physicochemical properties of it is soft and light. Spectral characteristics of sodium resonance radiation linewidths, red zone bias, high total radiation power; high-pressure sodium lamp light color and luminescence efficiency and sodium vapor pressure. At present, industrialized production of high pressure sodium lamp with mercury and sodium add lighting, can simplify the production process. At the same time, the consistency of lighting parameters is greatly improved.

When Mercury is in a liquid state, it has a silvery white mirror surface. Adding the pump can improve the working voltage of the lamp tube, reduce the working current, reduce the size of the small town flow, improve the power factor of the power grid, increase the arc temperature and increase the radiation power.

Xenon is a kind of rare gas, which is helpful to start and reduce the starting voltage. Although the use of high-pressure sodium lamp have many advantages, but the light color, color temperature of 2000K (Ra=30). In order to maintain high-pressure sodium lamp of long-life, high luminous efficiency and the warm tones atmosphere; in significantly improve color, through the tireless efforts of the people, has developed a meet the requirements of high color high-pressure sodium lamp (also known as the white high pressure sodium lamp). High color high-pressure sodium lamp is in high pressure sodium lamp based, by increasing the sodium vapor pressure and increased, the arc tube diameter, also in the arc tube ends wrapped in a layer of niobium foils, improve the cold end temperature and other measures to improve color; in addition, enhance the filling into the arc tube xenon pressure, leading to an increase in the arc center part of the temperature and the rest of the discharge temperature low, by changing the temperature distribution of the arc way to improve the color, the color index has been raised to RA = 70 to 80, above the luminous efficiency up to 80 lumens / watt, widening the field of application for the use of high color high pressure sodium replace incandescent coal bubble become a reality.

High pressure sodium lamp with high luminous efficiency, low power consumption, long service life, through fog and strong and mothkilling etc.. Widely used in road, highway, airport, dock, dock, station, square, street intersection, industrial and mining enterprises, parks, garden lighting and plant cultivation. high-pressure sodium lamp high bay and floodlights fixture are mainly used in gymnasium, exhibition hall, amusement parks, department stores and hotels.