How to design the height and spacing of solar street light poles

The average illuminance of the road surface is one of the evaluation indexes of urban motor vehicle traffic road and pedestrian road lighting, and it is also an important reference index for street lamp configuration. To configure or replace an urban road with LED street lights, the technology first involves the calculation of lighting indicators. Using the 'utilization coefficient' method to calculate is one of the relatively simple and effective methods.　　 The formula calculated by the 'utilization coefficient' method absolutely imitates the conclusions of traditional lighting theory research. What we have to do is to input some experimental or theoretical data of LED street lights into formulas, get the results and compare them with the requirements of road lighting design standards. It goes without saying that these calculations are also necessary for the design, development, improvement, enhancement and marketing of LED street lights.　　 Utilization factor (U) is the ratio of the luminous flux directly illuminating the road surface to the luminous flux emitted by all light sources, and it is related to the height, elevation angle, arrangement, and road width of the street lamp.　　 Luminous flux (Φ) is the sum of the energy emitted by the light source and received by the human eye. Indicates how much light energy is radiated per unit time, in lumens lm. Other expression methods: cd.sr (cd is the unit of luminous intensity: candela. Sr is the unit of solid angle steradian. 　　 Illuminance (E) is the ratio coefficient between the luminous flux and the illuminated area, the unit is lux lx. 1lx means Refers to the energy of 1lm of luminous flux evenly distributed in an area of u200bu200b1 square meter, that is, lm/m2. The average illuminance (Eav) of the road is the average of the illuminance of each point measured or calculated at a predetermined point on the road according to relevant regulations Value. 　　 Maintenance factor (k) is the ratio of the average illuminance or average brightness of the lighting device on the specified surface after a certain period of use and the average illuminance or average brightness obtained on the same surface when the device is newly installed under the same conditions. The installation height (H) of the luminaire is the vertical distance from the light center of the luminaire to the road surface. The installation distance (S) of the luminaire is the distance between two adjacent luminaires measured along the centerline of the road. 　　 Overhang length (XL) It is the horizontal distance from the light center of the lamp to the adjacent side edge stone, that is, the horizontal distance of the lamp extending or retracting the edge stone. 　　 Effective pavement width (Weff) is the theoretical pavement width used for road lighting design, and it is compared with the actual width of the road. The cantilever length of the lamps is related to the arrangement of the lamps.