What's wrong with LED street lights?
Although in the context of market development, LED street lights are gradually moving towards everyone’s vision, there are still some problems in the development of LED street lights. LED street lamp manufacturers ED street lamps have much higher light color rendering than high-pressure sodium lamps. The color rendering index of high-pressure sodium lamps is only about 23, while the color rendering index of LED street lamps is more than 75. From the perspective of visual psychology, it can reach the same brightness and the illuminance of LED street lamps is average. It can be reduced by more than 20% compared with high-pressure sodium lamps. With the rapid growth of the national economy, the contradiction between my country's energy supply and demand has become increasingly prominent. There is a serious shortage of power supply, and energy conservation is an urgent problem to be solved. Therefore, the development of a new type of high-efficiency, energy-saving, long-life, high color rendering index, environmentally friendly LED street lamps is of great significance to the energy saving of urban lighting. What is the specific problem? What are the problems with LED street lights?
One of the problems of street lamps: the problem of light distribution. The most common form of LED street lamps currently used is to install matrix LEDs in the lamps, which are installed almost on a plane. This design method cannot obtain a good light distribution effect of the lamps. Power LEDs are almost always equipped with a reflector (or lens), which is significantly more efficient than the reflector efficiency of the reflector.
The second problem with LED street lights: heat dissipation. At present, the road lamp housing is made of aluminum, and the outside of the lamp housing is directly used as a radiator, which can not only ensure the requirements of the IP protection level, but also obtain a large heat dissipation area. In addition, the radiator composed of the lamp housing can be washed by natural wind and rain when dust falls, so as to ensure the continuous effectiveness of the radiator.
Finally, the problem of LED street lamp driving power still exists. The requirement of the LED drive circuit is to ensure the characteristics of constant current output. Since the relative change area of the junction voltage is small when the LED is working forward, the constant current drive of the LED basically guarantees the constant output power of the LED.
