Basic knowledge of LED street lamp


Release time:

2023-12-15

LED street lamps (LightEmittingDiode, light-emitting diodes) are semiconductor lighting lamps. It is a high-efficiency solid-state light source based on the formation of 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 are diffused to the active region. After the radiation is combined to emit photons, the electrical energy is directly converted into light energy. It is a solid-state cold light source, which has the characteristics of environmental protection, no pollution, low power consumption, high luminous efficiency, and long life. Therefore, LED street lights will become the best choice for energy-saving road lighting. Advantages: 1, LED

LED street lamp (Light Emitting Diode, light emitting diode) that is semiconductor lighting. It is a high-efficiency solid-state light source based on the formation of 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 are diffused to the active region. After the radiation is combined to emit photons, the electrical energy is directly converted into light energy. It is a solid-state cold light source, which has the characteristics of environmental protection, no pollution, low power consumption, high luminous efficiency, and long life. Therefore, LED street lights will become the best choice for energy-saving road lighting.
Advantages:
The characteristics of the LED street lamp itself-the one-way of light, no light diffusion, to ensure the light efficiency.
2. The LED street lamp has a unique secondary optical design, which irradiates the light of the LED street lamp to the required lighting area, further improving the light efficiency to achieve the purpose of energy saving.
3, LED light source efficiency has reached 110-130lm/W, and there is still a lot of room for development, the theoretical value of 250lm/W. However, the luminous efficiency of high-pressure sodium lamps increases with the increase of power. Therefore, the overall luminous efficiency of LED street lamps is stronger than that of high-pressure sodium lamps. (This overall luminous efficiency is theoretical, in fact, the luminous efficiency of high-pressure sodium lamps above 250W is higher than that of LED).
4. The light color rendering property of LED street lamps is much higher than that of 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 above 75. Considering from the visual psychological point of view, to achieve the same brightness, the illuminance of LED street lamps can be reduced by more than 20% on average than that of high-pressure sodium lamps (refer to the British lighting standard).
5. The light attenuation is small, the light attenuation is less than 3% in one year, and the illumination requirement of road use is still met after 10 years of use, while the light attenuation of high-pressure sodium lamp is large, and has dropped by more than 30% in about one year. Therefore, the design of LED street lamp can be lower than that of high-pressure sodium lamp.
LED street lamps have automatic control energy-saving devices, which can achieve the maximum possible power reduction and energy saving under the condition of meeting the lighting requirements of different periods. Spark intelligent LED street lights can realize computer dimming, time control, light control, temperature control, remote control, automatic inspection and other humanized functions.
7. LED is a low-voltage device. The voltage for driving a single LED is a safe voltage. The power of a single LED in the series is 1 watt, so it is a safer power supply than using a high-voltage power supply, especially suitable for public places (for example: street lighting, factory lighting, automobile lighting, civil lighting, etc.).
Each unit LED chip has only a small volume, so it can be prepared into devices of various shapes and is suitable for variable environments.
Long life: can be used for more than 50000 hours, providing three years of quality assurance. The disadvantage is that the life of the power supply is not guaranteed.
10, high luminous efficiency: the use of more than 100LM chip, compared with the traditional high pressure sodium lamp can save more than 75% of energy.
11. Easy installation: no need to bury cables, no rectifier, etc., directly install the street lamp holder on the lamp pole or nest the light source in the original lamp housing.
12. Excellent heat dissipation control: The temperature is controlled below 45 degrees in summer, and passive heat dissipation is adopted, and the heat dissipation guarantee in summer is insufficient.
13, reliable quality: circuit power supply all use high-quality components, each LED has a separate over-current protection, no need to worry about damage.
14. Uniform light color: no lens is added, and uniform light color is not sacrificed to improve brightness, so as to ensure uniform light color without aperture.
LED does not contain harmful metal mercury, unlike high-pressure sodium lamps or metal halide lamps that cause harm to the environment when scrapped.
Based on the above principles, the energy-saving effect of high-power LED street lamps is remarkable, and it can save more than 60% of electricity instead of high-pressure sodium lamps.
Low maintenance cost: Compared with traditional street lights, LED street lights have extremely low maintenance costs. After comparison, all input costs can be recovered in less than 6 years.

Previous

Next