Energy saving of LED street lamp

Recently, an article entitled "LED lamp installation cost is too high ten city lights of Kunming rejected" article in the website, the article quoted the Xinhua News Agency "as China has in the 21 pilot city to promote the application of 1 million 600 thousand or more kinds of LED lamps, power saving more than 164 million degrees. "But then, but in the very unscientific algorithm, draw a misleading results: the 1 million 600 thousand LED lights than ordinary lights, need to spend 4 billion 800 million yuan, this calculation, takes about 60 years to recover the cost. This article was raised to the conclusion there are problems not only removed many inaccurate information, and the conclusion will reverse the tide, misleading views on semiconductor lighting this emerging industry, bad influence.

First of all, it is necessary to point out that the Xinhua news agency quoted the article is very clear that more than 1 million 600 thousand kinds of LED lamps and lanterns, rather than 1 million 600 thousand LED street lamp. In April 2009 the Ministry of science and technology organization's "ten city lights" pilot demonstration project started, is also clear that the pilot is not only the road lighting LED lights, including tunnel, subway stations, underground parking lot, gas station and other public places including lighting, indoor lighting, landscape lighting etc.. It is understood that, at present, 21 pilot cities in the installation of LED street lamp about 200 thousand, tunnel lights about 20 thousand, a total of about 660 thousand indoor applications. In addition, landscape lighting applications about 720 thousand lamps.

Secondly, the energy saving effect and cost of LED street lamp. The 150W LED street is often referred to as the substitute for 250W high pressure sodium lamp as an example, if every day for 10 hours, according to the standard tariff of 0.8 yuan / kwh per year, LED lights about saving 365 degrees (0.1kw * 10 * 365 hours a day), save electricity 292 yuan (365 * 0.8). 200 thousand LED road lamps annual saving of about 73 million degrees (200 thousand x 365), save electricity 58 million 400 thousand yuan (7300 * 0.8). According to the high cost of each LED street lamp high pressure sodium lamp 3000 yuan calculation, then the more than $200 thousand LED street lamp cost about $10 to recover the cost.

200 thousand LED lights, 10 years to recover the cost, it is very long, but this is just a hypothesis calculation, industry experts said that such calculations, should consider the actual power consumption, lighting in addition, currently around the price is not the same, the energy-saving effect is different, can not be generalized, for example, the paper pointed out that the Kunming price is 0.483 yuan belong to the price / degree, lower price, Guangzhou, Shanghai and other places is generally around 0.8 - 1 yuan / kWh, the peak price will be higher. Cost, the gap between the LED street lamp and the traditional street lamp is narrowing, the recovery period is shortened. Insiders said that the current 150W LED lamps instead of 250W high pressure sodium lamp, is expected to recover the cost of 3 years. In addition, with the development of technology, LED street in the continuous improvement of the performance, energy efficiency is also rising, and many places in China to actively explore the EMC application mode, or can help solve the problem of high cost.

In addition to the contribution of energy saving, LED's contribution to environmental protection, emission reduction should not be ignored. According to statistics, saving 1 kwh = emission reduction of 0.997 kg of carbon dioxide, saving about 1 kg of standard coal = emission reduction of 2.493 kg of carbon dioxide. According to the current 1 million 600 thousand sets or above all kinds of LED lamps, power saving more than 164 million degrees ", about 164 million kilograms of carbon dioxide emissions year, equivalent to saving 65 million 780 thousand kg of standard coal. According to the hypothesis 200 thousand LED street lamp electricity about 73 million degrees, then about 72 million 780 thousand kg of carbon dioxide emissions, equivalent to saving 2919 thousands of grams of standard coal. Nowadays, energy saving and emission reduction is a global trend, China is in an important period of energy-saving emission reduction, LED lighting energy saving is of great significance for achieving the sustainable energy in our country, the significance of environmental protection if the cost measure is not scientific.

In fact, whether it is to calculate the savings in electricity or LED lights to calculate the cost, there is how to treat the LED street lamp and its application. For LED street lamp energy saving, industry experts said, LED light source has many advantages, such as environmental protection, LED street lamp energy saving measures should be taken into account, rather than simply compare the recent cost of LED street lamps. For example, the semiconductor lighting with color temperature control, can make the road lighting the visual effect is more scientific and reasonable, LED street lamp can effectively control the range of light, with the advantages of effective average illuminance. In addition, compared with the LED street lamp life, the existence of the traditional street light source electrical system replacement and maintenance of the problem, the calculation of the cost is also considerable.

It can be seen from the initial cost alone LED street lamp is indeed higher than the traditional street lamp, but the long-term integration of various factors, LED street lamp has the advantage. Of course, can not be denied, LED street lamp is still in the development of technology, there are many problems to be solved, is not very mature, but also in accordance with the pilot phase of the first step to further advance the demonstration. For the pilot, insiders said that the pilot application helps find problems, improve, promote LED lighting technology, and constantly improve the quality of LED lamps, promote the development of semiconductor lighting industry, the Ministry of science and technology to promote industrial development of core technology and innovation ability, enhance the overall competitiveness of the semiconductor lighting industry the purpose of our country is consistent.

At present, semiconductor lighting is the future development trend of lighting has become a consensus, the domestic semiconductor lighting industry development today has made great progress, the support of the national level has intensified, such as "12th Five-Year" National Science and technology support projects related to semiconductor lighting plan and 863 in,