Solar lamps refer to lighting systems powered by solar energy. Solar energy is a clean, renewable and inexhaustible energy source. Not only can solar lamps use solar energy to generate electricity for dozens of hours at night, but they are also affordable. With such advantages, solar lamps have been widely adopted in many places. Solar lamps are generally made up of solar panels, controllers, LEDs (Light-Emitting Diode) and batteries. The solar panel absorb solar energy from the sun during the day and convert it into electricity. Then the stored electricity is converted into light-emitting energy by the controller and LEDs. The batteries are used to store the electricity for further use at night. During the day, solar lamps are able to provide lighting, at night, they can be used as security lamps. Solar lamps are particularly popular in rural areas in developing countries, as they can save people who lack access to a grid system from electricity bills. In addition, people in developed countries also prefer solar lamps due to their convenience and environmental friendliness. In conclusion, solar lamps are an ideal choice for illuminating purposes as they are efficient, affordable and environment-friendly.