120 w solar street light prices

Advantages of solar street light for energy conservation and environmental protection, green cleaning has been widely applied in the construction of rural road lighting. Why didn't the solar street light is widely used in urban areas? I believe you have such a doubt in my heart. Below small make up for this

solar street light for its advantage of energy saving, environmental protection and green cleaning is widely used in construction of rural road lighting. Well, then why haven't solar street light has been widely used in urban areas? I believe that everyone in the mind have such doubt. A small series below will give you the simple answer to the question. First of all, the solar energy is a kind of unstable energy. If continuous rain, it is impossible to ensure that 100% of the energy supply solar street lamps. Need to stabilize city street lamp lighting. Second, photovoltaic solar street lamps using solar panels absorb sunlight and produce electricity. However, there are plenty of high-rise buildings and trees in the city, and it will cover some of the shadow of the solar panels, so as to reduce the number of solar street light. Third, the urban road on both sides of the street lamp height is much higher than in rural areas of solar street light, it need better lighting. Therefore, it is necessary to use high-power lamps, this will lead to high configuration of solar street lamps and solar panels of big size, but too many solar panels are not installed on the light pole, thus affecting the street lamp lighting. Fourth, widely used in solar street light led light source with high pressure sodium lamp on the tonal and emittance have certain differences. Fifth, the solar cell need to be replaced with four or five years. Currently, most solar cells are buried in the ground. Therefore, replace the battery need to construction, it's not convenient to urban construction. Although the solar street light is a good thing, but they also have limitations. Believe that with the progress of science and technology, solar street lamp manufacturers in the continuous development and improvement of these problems will be solved in the future.