Comparison of LED street lamps and sodium lamps

Comparison of LED street lamps and sodium lamps: The characteristics of LED street lamps themselves - unidirectional light, no light diffusion, to ensure light efficiency. The LED street light has a unique secondary optical design, which irradiates the light of the LED street light to the area that needs to be illuminated, further improving the lighting efficiency and achieving the purpose of energy saving. The light source efficiency of LED has now reached 110-130lm/W, and there is still a lot of room for development, with a theoretical value of 250lm/W. 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. The light color rendering of LED street lamps is much higher than that of high-pressure sodium lamps. Sodium lamps are reduced by more than 20%. The light decay is small, the light decay in one year is less than 3%, and the illuminance requirements for road use are still met after 10 years of use, while the high pressure sodium light decay is large, and it has dropped by more than 30% in about a year. Therefore, LED street lights are used in the power design. Can be lower than high pressure sodium lamps. The LED street light has an automatic control energy-saving device, which can achieve the maximum possible power reduction and save energy under the condition of meeting the lighting requirements of different periods. Spark intelligent LED street light can realize computer dimming, time-segment control, light control, temperature control, remote control, automatic inspection and other humanized functions. LED is a low-voltage device, the voltage for driving a single LED is a safe voltage, and 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 and mine lighting, automotive lighting, civil lighting, etc.). Each unit LED chip has only a small volume, so it can be fabricated into devices of various shapes and is suitable for variable environments. Long lifespan: It can be used for more than 50,000 hours and provides a three-year quality assurance. The disadvantage is that the life of the power supply is not guaranteed. High luminous efficiency: Using chips of ≥100LM or more can save more than 75% of energy compared to traditional high-pressure sodium lamps. Easy installation: no need to bury cables, no rectifiers, etc., directly install the lamp head on the lamp pole or insert the light source into the original lamp shell. 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. Reliable quality: The circuit power supply adopts high-quality components, and each LED has a separate overcurrent protection, so there is no need to worry about damage. 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. LEDs do not contain harmful metallic mercury, unlike high-pressure sodium or metal halide lamps that are harmful to the environment when they are scrapped. Based on the above principles, the energy-saving effect of high-power LED street lamps is remarkable, and the replacement of high-pressure sodium lamps can save more than 60% of electricity. Low maintenance cost: Compared with traditional street lights, LED street lights have extremely low maintenance costs. After comparison, all investment costs can be recovered in less than 6 years. LED street lights can be widely used in urban streets, highways, expressways, factories, primary and secondary roads, squares and residential areas;