Energy-saving advantages of LED

    The power consumption of LED is only 1/10 of that of traditional light bulbs, but its service life is 100 times that of traditional light bulbs. Compared with high-pressure sodium lamps, which are widely used in roads, stations, squares and other public places, the power consumption of LED street lamps is only 40% to 50% of that of high-pressure sodium lamps. 100 watts of LED street lights are equivalent to 250 watts of brightness for high-pressure sodium lamps.

    A 250-watt high-pressure sodium lamp consumes 1 kWh every 3 hours, while a 100-watt LED street light consumes 1 kWh every 10 hours. According to 1000 urban public lighting street lamps, each lighted for 10 hours a day, the electricity price is 1 yuan: 250-watt high-pressure sodium lamps have a daily electricity cost of 3,500 yuan, and an annual electricity bill of more than 1.27 million yuan. The 100-watt LED street light can save energy by 2,400 degrees per day, saving more than 870,000 yuan in electricity bills a year, and the energy-saving efficiency reaches 68.5%.

    The service life of the high-pressure sodium lamp is about 4000 hours, and the average annual maintenance cost for each street lamp is about 120 yuan. Calculated on the basis of 1,000 street lamps, the annual maintenance cost is 120,000 yuan. The service life of LED street lights is more than 50,000 hours, and the normal use can reach more than eight years, and the damage rate is relatively low.

    LED is a light source and display device made of third-generation semiconductor materials. It has the characteristics of low power consumption, long life, no pollution, rich colors, and strong controllability. It is a revolution in the lighting source and light industry. The emergence of LED has not only ushered the century-old traditional lighting industry in the era of large-scale digital technology, but also applications involving information, transportation, medical treatment, agriculture and other fields. Its digital characteristics are one of the technical support for the upcoming Internet of Things era. First, it will trigger huge changes in human production and lifestyle.

    Compared with energy-saving lamps, it saves 50% of electricity and has a service life of several times. LED has obvious advantages, but at the same time there are problems such as high prices, insufficient performance of some products, and lack of breakthroughs in core technologies. Market application is an important means to solve these problems. In order to guide and cultivate the semiconductor lighting application market, in 2009, the Ministry of Science and Technology launched the pilot work of the semiconductor lighting application project ("ten cities, ten thousand lights"). As of September 2011, two batches of 37 pilot cities have concentrated nearly 4,500 semiconductor lighting The total output value of the enterprise is about 140 billion yuan.

    LED only emits light to half space, which means that without any form of reflector, the light emitted by the light source can also be emitted to the direction of the illuminated surface. This feature determines that the LED lighting energy-saving lamp is expected to achieve a lamp efficiency of more than 90%. At the same time, high luminous flux utilization can be achieved through reasonable optical design.