Countries are actively promoting the implementation of energy-saving and emission-reduction projects, especially LED street lamps in China are ＆#118alued by LED street lamp manufacturers because of the huge business opportunities. Street lamps are an important part of urban lighting. Traditional street lamps often use high-pressure sodium lamps. The shortcomings of low light efficiency of high-pressure sodium lamps as a whole have caused a huge waste of energy. Therefore, new types of high efficiency, energy saving, long life, high color rendering index and environmental protection have been developed. Of street lamps are of great significance to the energy saving of urban lighting.

    Characteristics of current LED street lamps:

    The difference between high-power LED street lamps and conventional high-pressure sodium street lamps is that the light source of high-power LED street lamps uses low-voltage DC power supply, a highly efficient white light diode (Light Emitting Diode, abbreviated as LED) is a high-efficiency solid-state light source based on a semiconductor PN junction that can emit light with weak electrical energy. Under a certain forward bias voltage and injection current, the holes injected into the P region and the electrons injected into the N region diffuse to After the source area, the photon is emitted through radiation recombination, and the electrical energy is directly converted into light energy.

    As a light source of street lamps, LED has many advantages compared with traditional street lamp light sources.

    1. The LED street lamp itself has light directivity, without light diffusion, to ensure light efficiency;

    2. The LED street lamp has a unique secondary optical design, illuminating the light of the LED street lamp to the area of ＆#8203;＆#8203;the required illumination, that is, the road surface, which further improves the lighting efficiency and achieves the purpose of energy saving;

    3. The LED light source efficiency has reached 100lm / W, and there is still a lot of room for development. The theoretical ＆#118alue can reach 250lm / W. The luminous efficiency of the high-pressure sodium lamp increases only with the increase of power. Therefore, the overall light efficiency LED street lamps are stronger than high-pressure sodium lamps;

    4. The color rendering of LED street lamps is higher than that of high-pressure sodium lamps. The color rendering index of high-pressure sodium lamps is only about 23, and the color rendering index of LED street lamps can reach more than 75. From the perspective of visual psychology, the same brightness can be achieved. The average illumination of LED street lamps can be More than 20% lower than high-pressure sodium lamps (refer to British road lighting standards); moreover, at intermediate visual levels, the human eye can more easily distinguish things in high color temperature environments than in low color temperature environments, avoiding certain dangerous situations;

    5. The light decay of LED street lamps is small, less than 3% in one year, and it still meets the road illumination requirements after 10 years of use. Therefore, the design of the power of LED street lamps can be lower than that of high-pressure sodium lamps;

    6. LED street lights can be automatically dimmed, which can meet the lighting requirements of different periods, reduce the power as much as possible, and save electricity;

    7. The LED is a low-voltage DC device, and the voltage for driving a single LED is a safe voltage, so it is a safer power supply than a high-voltage power supply, and is particularly suitable for public places. The characteristics of DC make LED particularly suitable for combination with solar energy and wind power;

    8. The LED die of each unit has only a small volume, so it can be prepared into devices of various shapes, and it is suitable for a variable and shockable environment;

    9. Long life: The theoretical life can be used for more than 50,000 hours;

    10. LED can be switched frequently without worrying about damage;

    11. Easy installation: directly install the LED street lamp base on the pole to replace the original sodium lamp base