Why high pressure sodium lamps are widely used in public areas.

- Sep 17, 2020-

After all, high-pressure sodium lamp is common in our daily life. It is widely installed in airports, stations, highways, docks and other places. Because the high-pressure sodium lamp has the characteristics of high luminous rate, low power consumption and long service life. So, what is the working principle of high pressure sodium lamp? Why high pressure sodium lamps are widely used in public areas.


The working principle of high-pressure sodium lamp: when electric atoms collide, high-pressure sodium lamp will produce some discharging substances (atoms that promote high-pressure sodium lamp to generate electricity) when working. When the density of sodium atoms is relatively high, its electrons and sodium atoms will collide with each other, so the high-pressure sodium lamp will produce widened Resonance radiation spectrum lines, and other visible radiation spectrum, namely light source, will also appear. The light-emitting principle is that when the high-pressure sodium lamp is working, it will generate an arc at the two poles of the arc tube, and this kind of arc will evaporate all sodium and Mercury by heat, making it sodium vapor. Then the cathode in the arc tube will emit electricity and turn to the anode. In this process, it will collide with the substances that generate electric atoms, and these electric atoms can obtain electric energy, the light source can be emitted when it is excited. This is the luminous principle of high pressure sodium lamp.