Greenpond Lighting Science & Technology Co., Ltd
The light source of street lamp is sodium lamp, sodium lamp is the electric light source to produce visible light by sodium vapor discharge. The sodium lamp is divided into low-pressure sodium lamp and high-pressure sodium lamp. The road generally uses the high-pressure sodium lamp, the working vapor pressure is greater than 0.01 MPa. The high-pressure sodium lamp is developed for strong single color of the low-pressure sodium lamp, poor color rendering and too long discharge tube. The high-pressure sodium lamp has the disadvantage of lighting of 360 degrees, large light losses to cause huge waste of energy, meanwhile it also has strong ability to penetrate the haze, therefore it is able to provide security for city roads under the condition of haze.
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