Recently, Huancheng Road in Wenzhou City is undergoing street lamp renovation and upgrading. The high-rise LED light source will replace the traditional high-pressure sodium lamp and become the lighting source for citizens to travel at night.
In May 2018, the Municipal Administration began to try to install the proposed LED light source. After testing and testing, it met the requirements, and since August last year, some urban street lamps have been replaced with LED light source.
It is understood that the urban street lighting source transformation is looking at the advantages of high utilization rate of LED light source, long service life, good illumination and color rendering, more energy-saving and environmental protection. The traditional high-pressure sodium lamp is the light source of all-space luminescence, in fact, less light is illuminated in the road direction; while the LED lamp is one-way luminous, light flux loss is small, and the utilization of light source is high. In terms of energy saving and environmental protection, the traditional high-pressure light source contains metal mercury and metal sodium (mercury vapor and sodium vapor after electrification), and the subsequent waste disposal pollutes the environment greatly; while the LED is a solid light source, without any gas, the street lamp does not contain harmful metal mercury, which is relatively safer and more environmentally friendly, and the waste has less environmental pollution. In addition, in terms of color rendering performance, high-pressure sodium lamp has low color rendering index, poor color rendering, poor color reducibility of the object itself, which is not conducive to judging the depth of the surrounding environment; LED light source has high color rendering index and good color rendering performance, which can well restore the actual color of the object, and is closer to natural light color. Another point is that the service life of traditional high-pressure sodium lamp is 1 to 3 years, while the average service life of LED lamp is more than 5 years.
At present, more than 30,000 street lights have been replaced in Wenzhou, and nearly 40,000 LED street lights are expected to be installed in the first half of this year.