Is light earned? Campus LED lights change nearly 8 million years in 5 years.

CNR news, does the world make light trading? Yes! Recently, all the lamps in the campus of Dalian Polytechnic University are all new with a great increase in brightness. The "replacement", the school changed a total of more than 41000 lights, but not only spend a penny of school, a year will save a lot of money.

According to Liu Zhenguo, director of the general affairs department of Dalian Polytechnic University, all of the schools are replaced by LED energy-saving lamps. These lamps are provided free of charge by the lamps and lanterns enterprises, and schools do not need extra money. As long as the part of the electricity saved in the contract period (5 years) is paid to enterprises, it is enough. He made an account: the school last year lighting electricity charges 2 million 280 thousand yuan, lamps and lanterns maintenance cost 300 thousand yuan, altogether spends 2 million 580 thousand yuan. After changing to LED energy saving lamp, the electricity charge per year is only about 1 million, and the lamp maintenance cost can basically be waived in five years. In this way, saving nearly 1 million 600 thousand in one year and 8 million in 5 years.

What is the energy saving effect of LED energy saving lamp? Professor Zou Nianyu, director of Photonics Research Institute of Dalian Polytechnic University, has calculated another account: she said that LED is the abbreviation of Light-Emitting Diode. The LED light source is the light source of light-emitting diodes. It is another new revolution of lighting technology since Edison invented the incandescent lamp.

LED energy saving lamps have the advantages of incandescent lamps and other lamps, which are difficult to shoulder with: longer life. Ordinary incandescent lamp life expectancy is only one thousand hours, and ordinary energy-saving lamps are only eight thousand hours. The normal life of LED lights is usually fifty thousand hours. This greatly reduces the maintenance cost of lamps and lanterns, and avoids frequent changes. Electricity is more efficient. The power consumption of LED lamp is very low. Under the same lighting effect, the lighting effect of 45 watt ordinary fluorescent lamp is only 15 Watt LED light source. The light efficiency is even higher. In the lighting industry, lumen is used to describe the amount of light radiated by the luminaire. Incandescent lighting efficiency is about 20 lumens / watts, fluorescent lamps are 60 lumens / watts, and LED lighting efficiency can reach 120 lumens / tiles, and will continue to improve with technological progress. Better light and color controllability. The luminous color and brightness of LED are variable, and can be adjusted according to actual needs, so that the light environment can change as needed. The safety factor is even higher. The LED lamp is a cold light source. It does not generate heat. It has direct current, low voltage, small danger and high safety factor. More green. LED lamps have no harmful metal mercury, non-toxic, no infrared and ultraviolet radiation. They will not generate electromagnetic interference, shock resistance, impact resistance, and are not easy to break, and can be recycled and reused. More conducive to healthy lighting. After reasonable circuit design and optical design, LED lamps can have no strobe, no glare and light is more gentle, which is conducive to the protection of eyesight and make the living and learning environment more comfortable and healthy. The campus green lighting of Dalian Industrial University has earned more than just "light". It has also earned savings, environmental protection and health.

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