Lighting is a kind of energy source that requires all living creatures on the earth. It is an important resource for the development of human society, and it plays a vital role in people's daily life. Lighting is a popular form of energy. Many people use light energy to meet their daily needs. Lighting has three basic forms, including natural lighting, artificial lighting, and electrical lighting. Natural lighting comes from the sun, stars, and moon. It is free and renewable. Artificial lighting is usually provided by electricity and some fuel sources, such as gas, coal, oil, etc. Electrical lighting is a type of artificial lighting, which is converted from electric current to light by electrical equipment. It can be used for indoor lighting, outdoor lighting, and other specific functions such as traffic lighting and emergency lighting. Lighting has numerous advantages, including providing illumination, promoting security, and even creating atmosphere. Thanks to lighting, humans can have more activities after dark. Moreover, lighting can also save energy and achieve certain effects of environmental protection. In summary, lighting is a necessary and popular energy source. It not only provides illumination but also creates atmosphere in people's life. Lighting plays a great role in human life.