Solar street lamps used in city road is exerting its advantages, as an outdoor street light, solar street lamps have been fully play its good lighting, light and comfortable, according to the things is very clear, can let people and vehicles travel safely and driving, reduce the number of traffic accident problems, and solar energy street lamp used in the road is not what the electricity charge. Photovoltaic street lamp has been are all emphasize is a kind of green environmental protection function, can in this respect everyone find no obvious prominent place, only know that it is solar energy as an energy source, didn't see what environmental protection effect. Although is not obvious, but can be seen from the use of solar energy as energy to provide it behind it role in environmental protection. Solar street lights with solar energy as the energy is that it does not require consumption of standard coal to convert electricity use, and we burn coal is usually will produce harmful gases like carbon dioxide and sulfur dioxide, the solar street light without consuming coal, what won't discharge and gas, so the solar street light has the function of environmental protection.