The utility model provides a photovoltaic power generation counterbuff that gives out light, give off light, includes photovoltaic power generation board, battery, LED sign, and its characterized in that is equipped with the case of hanging of taking the under casing door, hangs an incasement and is equipped with the battery, and the back that hangs the case is equipped with the joint ring that is connected with the pole, hangs a case up end and is equipped with the photovoltaic power generation board, and the front that hangs the case is equipped with the LED sign, and the photovoltaic power generation board is through transformer controller and electrical connections battery, and the battery is connected with the LED sign is electric through control switch, the utility model discloses during the use, will hang the case through the joint ring and connect 2.5 meters to 3.5 meters of pole, the photovoltaic power generation board is received the sunlight and is alternatied into the electric energy and stocks the battery in, and the LED sign sends safe suggestion or advertisement according to the instruction, has the advantage as follows: firstly, the security is high, and daytime energy storage night is luminous is convenient for improve the security, and the illumination that need not reflect other light sources ensures that the device is striking, secondly, efficient, the device uses reliably, and on -the -spot installation sticker is removed in the avoidance of repetition, thirdly, strengthen public service ads, the propaganda of electric power safety and commercial advertisement function.