Comparison of LED street lights and sodium street lights
At present, the world is promoting energy conservation and emission reduction. The price of LED factory lights, the specifications of high-bay lights, the manufacturers of curtain wall lights, and the manufacturers of floodlights are also striving to create a resource-saving and environment-friendly society. The concept is also gradually gaining popularity. With the continuous advancement of science and technology and the rapid development of semiconductor material application technology, low-power LED light sources have been widely used in landscape lighting, and high-power LED street lights have attracted more and more attention from all walks of life.
The luminous principle of LED street light source:
LED is the abbreviation of Light Emitting Diode in English. It is a light-emitting diode. It is made of III-IV compounds, a solid-state semiconductor device, which can directly convert electricity into light. The heart of LED is a semiconductor wafer, the semiconductor wafer consists of three parts, one part is a P-type semiconductor, in which holes dominate, and the other end is an N-type semiconductor. When the current acts on the wafer through the wire, the electrons and holes will be pushed into the quantum well, and the electrons and holes will recombine in the quantum well, and then will emit energy in the form of photons, which is the principle of LED light emission. The wavelength of light, which is also the color of light, is determined by the material that forms the P-N junction.
The luminous principle of high pressure sodium light source:
The high-pressure sodium lamp uses an electric arc between the electrodes at both ends of the arc tube after being energized. Due to the high temperature of the arc, the sodium amalgam in the tube is heated and evaporated into mercury vapor and sodium vapor, and the electrons emitted by the cathode are in the process of moving to the anode. The atoms of the substance can obtain energy to produce ionization or excitation, and then return to the ground state from the excited state; or change from the ionized state to the excited state, and then return to the ground state in an infinite cycle. At this time, the excess energy is released in the form of light radiation, Light is produced.
High-power LED street light is a new type of lighting method that realizes the lighting needs by lighting the LED group with DC low voltage. It has the characteristics of high brightness and good color rendering; The combination of solar energy makes solar LED street lights a possibility for future road lighting.
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