With the trend of the more modern science and technology, all kinds of new type can also continuously, the invention of steam engine from the 18th century, to the beginning of the 20th century, it is still the world's most important prime mover, to solar technology development so far, the invention of the principle of the interest rate
with the development of modern science and technology, all kinds of new energy based inventions emerge in endlessly. From the 18th century the emergence of the steam engine to the beginning of the 20th century, it is still the world's most important motive power, and solar technology development up to now, the invention principles are closely related. According to statistics, in the national sales on the market of lamps and lanterns, the traditional light bulb had largely disappeared, incandescent lamp had already withdrawn from the market. Especially in recent years after the introduction of led light source products, sales of incandescent lamp has fallen dramatically. In addition, the government is vigorously promote green lighting, now all kinds of energy-saving products have been recognized by ordinary people. Therefore, in the construction of many cities, all the old street lamp was replaced with the solar street light. First of all, the appearance of the solar street light brand should be more beautiful. The most important of all, using solar street light, the government can save a lot of electricity every year. Late 5 meters integrated solar street lamps and save a lot of maintenance costs. Therefore, the use of this energy saving products is one-time investment, but the reward is very big. Solar street lamp, of course, not only is widely used in primary and secondary roads in the city, and there are many different kinds of products, can be widely used in more places. After the design and construction, installed in the village's main road 22 comprehensive solar street light. These lights are completed by the end of last year. Zheng Shimin benevolence lit up the night village and people's happy life. Looked at the side of the road straight rows of fashionable integrated solar street lamps, the village farmer He Xian fang very excitedly said: 'the village before night is very black. Now have a street lamp. The road is very bright. To go for a walk at night, the villagers under the street light or singing and dancing, to enrich their life, exercise their bodies. The small village is also very busy. ”