Significance of LED street lighting for the city lighting
Streetlights are an important part of urban lighting , traditional high pressure sodium street lights often used , but the low- pressure sodium lamp overall efficiency glazing shortcomings caused a huge waste of energy , therefore , the development of new high efficiency , energy saving, long life, high color rendering index , green lights have great significance for the city lighting energy . LED lights for urban development significance.
First , LED street light source is a semiconductor diode , its life is very long. When the flux attenuation to 80 %, the life expectancy of 25,000 hours . The metal halide lamp life of 6,000 to 12,000 hours, high pressure sodium lamp life is 12,000 hours . LED lights last longer .
Second, the basic structure of the LED lights is an electroluminescent semiconductor materials , placed on a wire rack, then sealed with epoxy resin around , play a role in protecting the internal core wire , so the seismic performance of LED lights .
Third, the white LED Tube light color is better than high-pressure sodium lamps. In the middle of the visual level , the human eye in a high color temperature environments easier to distinguish things than low color temperature environments. White color LED lights are also much better than the high-pressure sodium lamp , high pressure sodium lamp CRI is only 20 right and left , and white LED lights can be up to 65 to 80. LED lights better color rendering .
Fourth , LED lamps can achieve a more perfect dimming function. Due to the large scope of LED lights , the light output and the operating current is proportional , so you can reduce the current approach to dimming. In addition , due to the frequent switching of LED lights is not much damage to its dimming LED lights pulse width modulation method also can be used to get by adjusting the duty cycle of the voltage and operating frequency , can effectively regulate the luminous LED lights strength. So convenient and more efficient LED lights .