Comparison of LED lights and traditional sodium lamps

At present, China is creating a resource-saving and environment-friendly society, "green lighting" concept is also gradually popular. With the continuous progress of science and technology, the rapid development of semiconductor materials application technology, low-power LED light source has been widely used in landscape lighting, high power LED lights are also more and more attention.

Comparison of LED lights and traditional sodium lamps

LED, light-emitting diodes, is made of III-IV compounds, is a solid-state semiconductor devices, it can be directly converted into light. LED heart is a semiconductor chip, semiconductor chip consists of three parts, part of the P-type semiconductor, in which the dominant hole inside, the other end is the N-type semiconductor. When the current through the wire on the role of the chip, electrons and holes will be pushed to the quantum wells, electrons in the quantum wells with holes, and then will be in the form of photon energy, which is the principle of LED light. And the wavelength of light is the color of light, which is determined by the material that forms the P-N junction.

High-pressure sodium lamp light principle:

High-pressure sodium lamp is the use of power, the arc tube between the electrodes at both ends of the arc, due to the high temperature of the arc so that the tube of sodium amalgam heat evaporation into mercury vapor and sodium vapor, cathode electrons in the process of moving to the anode, The atoms of matter, so that the energy generated by ionization or excitation, and then from the excited state to the ground state; or from the ionization state into the excited state, and then return to the ground state infinite cycle, this time, the excess energy in the form of optical radiation, It produces light.

High-power LED street lamp is a kind of new lighting method which realizes the lighting demand through the DC low-voltage light-emitting diode group. It has the characteristics of high brightness and good color rendering. In addition, because the input of LED street lamp is low-voltage direct current, solar energy together, making solar LED lights become a way of future road lighting possible.

On energy efficiency analysis, comparison

Should be in accordance with the same illumination (brightness) level, close to the lighting quality standards under the premise of both the lighting installation power. High-power lamp (100 ~ 150W) light efficiency of about 80 ~ 1001m / W, and the use of high-power LED (250 ~ 400W) high efficiency, up to 130 ~ 1401m / W, Street lights with 1WLED tube, the light effect are similar, it is appropriate for high-power street lamps and low-power street lights for analysis.

High power (≥250W) lights: high pressure sodium lamp high efficiency, considering the ballast loss, lamp efficiency and track utilization and other three factors, the overall efficiency of 0.55 dollars, the effective light effect of sodium lamp is about 70 ~ 751m / W; and LED lights effective light effect, currently in the United States is about 621m / W, the best domestic enterprises have reached 56 ~ 581m / W. Therefore, the ancient town of Runjing lights feel for high-power street lamps, the current LED energy efficiency than the sodium lamp is lower.

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