Talking about the development trend of LED city lighting street lamps

Although there are many enterprises in China that develop and produce LED urban street lamps, many of them use low-power LED arrays as illuminants. The heat dissipation problem is solved. The number of LEDs used is much higher. The low-power LED light is weak and the installation cost is high. The use of high-power LEDs for urban lighting LED street lights is a trend. A few street lamps that use high-power LEDs as illuminants do not solve the problem of heat dissipation of LEDs, astigmatism and concentration control of LEDs. The illumination range of the road surface, the balance of the type and illumination, the photoelectric conversion efficiency is too low, and the performance of the product is not satisfactory. High-performance products are still high in price and difficult to promote. Heat dissipation and reliability are the main factors affecting LED applications.
LED device products are applied to street lamps. The special technical requirements are mainly to design LED light intensity and illumination angle. In addition, due to the combination of multiple LEDs, the illumination design should take into account the illumination area. Sex.
Compared with ordinary street lamps, LED street lamps have the following advantages: energy saving, environmental protection, easy to adapt to low voltage, and can also be directly matched with solar energy system, without additional inverter and conversion process, and can achieve maximum energy utilization.
There are also some shortcomings in the use of LED street lights. For example, the illumination angle is small and uneven, the color rendering index is low, and the optical and heat dissipation design is complicated. In addition, the luminous flux under the current technology is not enough, the light effect is too low, and the quality is difficult to guarantee. Therefore, the application of LED products to street lamps requires special design and requires special standards (using the test data of traditional light sources to evaluate LED light sources is often not objective).
The application of LED to street lamps has inherent advantages and disadvantages.
The advantages are: First, LED as a point source, if the design is reasonable, it can directly solve the problem of secondary light extraction and optical loss that traditional spherical light source must rely on light emission to solve; second, uniformity of light irradiation surface The degree is controllable, theoretically it can be completely uniform in the target area, which can also avoid the waste of light in the bright phenomenon under the traditional light source lamp; third, the color temperature is optional, so that in different occasions, the efficiency is also improved. An important way to reduce costs; fourth, there is still a lot of room for technological progress.
Disadvantages (factors affecting the promotion and application of street lamps): The current price is too high, the luminous flux is low, and the current LED illumination source with the same illumination design is about 4 times the price of the traditional light source (although in the street lamp products, the total cost of the light source is not high) Therefore, the cost increase ratio in the engineering installation will not be too high, and the application space is still relatively large), which is unbearable in civilian use. Current design and manufacturing standards are confusing, and the damage ratio is high, which affects the life of the LED.