LED "green light" and "green use"

After the night of the city, more and more buildings, green spaces, bridges are a new type of energy-saving light source - LED (semiconductor lighting), decorated dazzling. At this time, as you are aware, the new pollution is likely with the "light" sneaked into the night. Called the "green light" new power LED lighting, how can ride with pollution? The overall planning of nightscape lighting Expo Center responsible person, Tongji University professor of visual and lighting art study of Hao Luoxi and his team found on the spot investigation: "for the blind pursuit of green light", make people relaxed vigilance on light pollution; the use of such a project as a potential source of contamination. Experts say Shanghai is expected to pay attention to the problem when it comes to designing and decorating the park and the night scene of the city in World Expo next year. Energy-saving lamps and zero pollution LED "green", is the luminous efficiency. It is the use of electronic mobile light-emitting, can be directly converted into electricity energy, therefore, the same light, power consumption is only 1/10. This "energy-saving pioneer", and the city landscape lighting can be described as "soul". As a result, around the country set off a round of landscape lighting boom: while replacing the traditional lighting with LED, while allowing more flooded in the night of the building covered with LED woven bright coat. City becomes bright, and the electricity consumption declined LED for energy saving and emission reduction does not. However, the survey found that these colorful light coat, not overdone - "LED light source light, jump, color not only covered the whole building facade, and rapidly changing colors and patterns, will render the sky like daylight; many billboards in the large area of the LED display in the form of standing at the crossroads of traffic. "Hao Pelosi said, energy consumption, LED can be described as" green "bright; but the light environment," green label "can not luantie. Compared with traditional landscape lighting, LED has the characteristics of strong direction, light distribution, color saturation, dynamic changes of higher modes, which means that it is more stimulation to the eye, "people with chronic exposure to such light environment, light is easy to produce glare, and will affect the vision health and safety". Hao Luoxi suggested that, on the one hand to strengthen the application of LED, LED on the surface brightness should be in control of how much "," dynamic screen size "and other issues to give a scientific answer; on the other hand, night scene planning should be people-oriented, not simply that anyway LED power, a bit better". Decide the details of "green" and "green" either LED, or conventional light sources, in addition to control surface brightness, lamp position, projection angle, color selection and other technical details, may affect its "green" and "green". Hao pointed out that when the light pollution in urban governance, a similar sense of detail has yet to be strengthened. For example, the green light to green lighting is very common, but it not only makes the evening trees become lustrous and dazzling but also prone to interference to the driver, recognition of traffic lights, increase security risks. For example, shopping malls, office buildings in front of the trail lights are often installed in the flower beds, 1 meters high light "station" on the upper half of the height of the flower bed, the glare of the light is located in the height of the pedestrian line of sight, it is difficult to avoid. Commercial Street, large billboards of tens of meters a is a "double-edged sword": a row of lamps billboards below the upward projection easily spill directly into the sky, not only light, no light, actually exacerbated artificial daylight". "The light in the photo, is not only a waste, or sometimes damage. "According to the survey found" vulnerability ", Hao Pelosi suggested that a more reasonable approach is to different function areas of the city light level hierarchical management, defining a surface brightness level for different types of buildings, to avoid" between the floor and dark light, bright and more bright "mentality, create a harmonious and ecological night view of the city environment. The public to have a "light health consciousness light pollution not only appear in the outdoor, also hidden family school, office and other indoor lighting with a lot of" health killers". Shanghai Heping Ophthalmological Hospital, vice president Julie confirmed to reporters, the incidence of cataracts, glaucoma and other blinding eye disease is rising year by year, and presents a younger trend. In addition to genetic, pressure and other factors, unhealthy lighting environment is also a major incentive. However, the public's "light health" awareness is relatively weak, everyone's understanding is still in the "not myopia, that is, health" level. Hao Pelosi told reporters, light environmental health including illumination brightness, light quality, color and other elements, and most of the public only care about the environment "is bright enough, there are a lot of understanding blindness. For example, many parents believe that children do work as long as the desk lamp is bright enough, no need to open the room lights. In fact, in the absence of the main light, the child's eyes had to adjust back and forth in bright and dark environment, easily lead to eye fatigue.

Author: Ren Quan