Street lamp power supply solution

Traditional high pressure sodium lamp, road lamp often USES low light efficiency of high pressure sodium lamp faults causing the huge waste of energy, therefore, to develop new type of high efficiency, energy saving, long life, high color rendering index of city lighting energy saving, environmental protection of the street lamp is of great importance to the

the way of traditional lights usually use high pressure sodium lamp. A disadvantage of low high pressure sodium lamp luminous efficiency on the whole, caused a huge energy waste. Therefore, development of new type of high efficiency, energy saving, long life, high color rendering index of city lighting energy saving, environmental protection of the street lamp is of great significance. As the led street lamp light source, light-emitting diodes (leds) than the traditional high pressure sodium lamp has many advantages. First of all, the light emitting diode is a semiconductor diode, its long service life. When the flux decline to 80%, its life of 25000 hours. The service life of metal halide lamp is 6000 - The service life of 12000 hours, high pressure sodium lamp is 12000 hours. Led street light of longer life. Second, the basic structure of light emitting diode is an electroluminescent semiconductor materials, it, together with the lead on the shelf, and then sealed with epoxy resin, in order to protect the internal core. Therefore, light-emitting diodes (leds) has a good seismic performance. Third, the white LED light color is better than that of high pressure sodium lamp. In middle level vision, the eye under the environment of high temperature than at low temperature environment is much easier to identify things. White light-emitting diodes (leds) color rendering is better than high pressure sodium lamp. Color rendering index of high-pressure sodium lamp only 20 from right to left, and white leds color rendering index up to 65 ~ 80. Led street light has better color rendering. Fourth, leds can realize perfect dimming function. Due to the light emitting diode work scope is very big, the light output is proportional to the current work, so can reduce the current to the dimmer. In addition, due to the light emitting diode frequently switch will not cause too much damage to the light emitting diode, so also can adopt the method of pulse width adjustment to realize the light-emitting diode dimming, by adjusting the voltage ratio and the working frequency of empty can effectively adjust the luminous intensity of leds. Led street light is more efficient and convenient. After reading the above introduction, LED street light than the high-pressure sodium lamp has many advantages, but there are limitations. Leds are not suitable for high-power lamp head, because under the condition of high power lighting, led heat dissipation is not good, is better than the traditional high pressure sodium lamp. In addition, the permeability of it is not good, use effect is better than yellow high pressure sodium lamp in the fog.