Explanation of terms related to road lighting

Road lighting originally relied on igniting wood. In the winter of 1667, oil lamps appeared on the streets of Paris. In 1806, there were gas lamps on the streets of Baltimore, USA. Arc lamps illuminate the streets of Paris in 1842. In 1878, the United Kingdom first used carbon filament incandescent lamps. In 1932, low-pressure sodium lamps appeared on the streets of the Netherlands. In 1935, the high-pressure mercury lamp was introduced. In 1965, high-pressure sodium lamps were used for road lighting. China started using gas lamps on Nanjing Road in Shanghai in 1865, installing arc lamps on the Bund in 1882, and using incandescent lamps in 1890. High-pressure sodium lamps are often used for rear road lighting because of their high luminous efficiency. In addition, incandescent lamps, high-pressure mercury lamps, low-pressure sodium lamps, and fluorescent lamps are also used. Road lighting only needs to make the road surface have a certain brightness, increase the brightness difference between the object and the road surface, so that the driver can identify people or objects in outline. The quality of road lighting can generally be measured by four indicators: road brightness, uniformity, glare, and inductivity. Luminance is the amount of light reflected per unit area of u200bu200bthe road surface, measured in nits. Uniformity is the uniformity of the brightness distribution on the road surface. If the distribution is not uniform, the obstacles will be difficult to find and the driver's visual comfort will be poor. Glare is a phenomenon in which strong light hits the driver's eyes directly, causing a visual impairment and making it impossible to see objects clearly. Inductiveness is the use of lighting to inform the driver about the alignment, undulation, intersection, and merging of the road ahead. The arrangement of illuminators for road lighting can be arranged symmetrically on both sides of the road, staggered arrangement, one side arrangement, suspension arrangement in the center of the road, etc., depending on the width of the road. Usually, roads with a width of more than 20 meters and welcoming roads are arranged symmetrically on both sides. Roads with a width of 15 to 20 meters can be arranged in a staggered manner on both sides, and narrower roads can be arranged on one side. [The above content is organized and released for you by solar street light manufacturers]
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