Light distribution requirements of LED street lights

Light distribution requirements of LED street lights

In road lighting, if the LED street light source is not distributed, the light type irradiated on the road is a large circular spot, and there will be some light scattered outside the road without being operated. The LED street lamp performs light distribution, and the light pattern or spot formed by the light output from the LED street lamp illuminating the road surface is preferably a rectangle. In the manufacturing process of power LEDs, the use of lens technology in packaging can improve light efficiency, reduce light output loss, and change light output characteristics. The packaging lens technology of LEDs has a certain relationship with the primary light distribution of high-power LED street lights. Through a good package lens design, LED outdoor street lights can obtain better light output characteristics. The LED secondary light distribution with total reflection lens. The light is emitted from the relatively dense medium to the relatively light sparse medium. When the incident angle is greater than the critical angle, total reflection can occur. This principle is used to design an axisymmetric total reflection lens. Regardless of the technical means or scheme adopted, as far as the light distribution of LED street lamps is concerned, its light output characteristics meet the requirements of night road lighting standards, and the technology or scheme has good use value.