Solar lights are lights that are converted into electrical energy by solar panels. The solar light is composed of solar battery components, some LED lamps, a control box (with charger, controller, and storage battery in the control box) and a light pole. A solar cell made by the principle of photovoltaic effect. During the day, the solar panel receives solar radiation energy and converts it into electrical energy. It is stored in the battery through the charge and discharge controller. At night, when the illumination is gradually reduced to about 101ux, the open circuit voltage of the solar panel is around 4.5V, the charge and discharge controller will act after detecting this voltage value, and the battery will discharge the lamp cap. After the battery is discharged for 8.5h, the charging and discharging control action is performed, and the battery discharge ends. The main function of the charge and discharge controller is to protect the battery.