In the light irradiation is garden light or something good can Yang street lamp can charge

At the time of installing solar street light, we often encounter such problems, solar street light with the light exposure can charge? For this problem, in general physics is studied people who do not pass, because according to the law of conservation of energy, it is not possible



we are installing solar street light [ Solar street light is a crystalline silicon solar battery power supply, valve control type sealed and maintenance-free battery ( Gel battery) Store electricity, super bright LED as light source, lamps and lanterns and controlled by the intelligent charging and discharging controller, is used to instead of the traditional public power lighting lamps. 】 , often encounter such problems, solar street light with the light exposure can charge? For this problem, in general physics is studied people who do not pass, because according to the law of conservation of energy' The law of conservation of energy, 能量守恒定律) The first law of thermodynamics is to point to in a closed ( Isolated) The total energy of the system remains constant. 】 , this is impossible, unless the power several times greater than the solar street light, the light and the light is particularly strong, can achieve the result of sunshine during the day. Solar panels 【 Solar panels, 太阳能板) Is by absorbing sunlight, the solar radiation through the photoelectric effect or photochemical effect directly or indirectly converted into electrical energy device, the main material of most of the solar panel as the 'silicon', but because of the production cost is larger, so it widely used, we still have some limitations. 】 Efficiency is about 17%, if it's 30 watts of solar street light, if we can generate enough solar street lamps use, you need at least 170 watts of the light to illuminate, and 170 watts of electric light all the electrical energy into light energy. Unfortunately the light to electricity conversion rate is only 5%, so you need to incandescent lamp for more than 3400 watts of power, and to ensure that all the light shines on the solar panels on! Can actually do it? Our answer is impossible, we have done the experiment, can achieve the same effect as the sun, need to use more than 5000 - watt incandescent lamp to complete the task.