Green lighting challenges energy waste

Yesterday's newspaper the first domestic LED infrared induction lamp at the birth of the fertilizer reported, caused a lot of public attention, they have a variety of calls asking questions: "why LED lamp can save electricity? Is it expensive? LED lights in the end how much electricity can be saved? "Today we invite experts to answer. LED lamp energy about the principle of LED lamp energy saving than the highest Hefei University of Technology Faculty of electrical engineering Dean Wang Jianping issued the same brightness of light: why consumption is not the same? In fact, most of the electric incandescent lamp can be its heat consumption, the real rate is only 5% for the luminous energy; fluorescent lamp as a cold light source, its energy utilization rate can reach 60% to 70%; and the LED lamp is a solid semiconductor chip, using its energy rate can reach 90%. It is not difficult to see, LED lamp energy efficiency ratio is the highest, but also the most electricity. The level of a year, saving ten of the Three Gorges power plant for LED lamp, Wang Jianping calculations, LED lamp and incandescent lamp 60W a 5W with the same light effect, if every time is 6 hours by electricity, incandescent power consumption of 0.36 degrees, the LED lamp is only 0.03 degrees, the savings in electricity is very considerable. At present, the high cost of R & D of LED lamp is only 150 yuan to $200, but the service life is as high as 5 ~ 10 years, while the life of ordinary incandescent lamp is less than half a year. The use of cost and purchase costs are counted, the long-term is still more economical LED lamp (see table). Wang Jianping pointed out that the energy saving effect of LED light is not only the significance of electricity accounts, China's energy mainly depends on coal-fired thermal power generation mode, this will bring a series of environmental problems such as air pollution, the State encourages the "green lighting" not only to save energy, but also to protect the environment. Don't look down upon a small lamp, China's lighting power consumption accounted for roughly 10% of the total national power - 12%, if the incandescent lamps are replaced by LED light, a year and the festival consumption equivalent to the current 10 generation capacity of the Three Gorges power station. "Pilot" for "intermittent lighting" Hefei Sanchuan company engineers said that in some occasions, such as underground garage, hotel hall, lighting does not need most of the time, but in 24 hours lamp working condition, the annual cost of consumption is quite amazing, they developed the LED infrared induction lamp "long" for "intermittent lighting", people (car) came to light, people (car) go out, saving more. For example, a 100 parking spaces in the underground garage, need to install 150 lights, all use 20 Watt fluorescent lamp, 24 hour power consumption of 0.48 degrees, the garage five years of consumption of 150 x 0.48 x 365 x 5 = 131400 degrees, all replaced by energy-saving LED lamp, infrared sensors make it work time "compression" for 6 hours, a 5W LED lamp 6 hour power consumption 0.03 degrees, five years of electricity consumption is only 150 x 0.03 x 365 x 5 = 8212. At present, Hefei has been building underground garage and other places began to use infrared induction LED lamp.

Source: Hefei Evening News