Light is an important form of human vision and perception. Lighting plays an important role in human life, and can even control the human physiological system. Lighting is widely used for lighting in home, office, entertainment and other places. The proper use of lighting can create a pleasant and comfortable atmosphere, as well as enhance the beauty of the environment. With the development of energy-saving lighting technology, LED lighting has become the main form of lighting. LED lighting not only has the advantages of high brightness, low power consumption, long life, but also has a wide range of applications. In addition, the research of lighting technology is not only limited to the application in the commercial field, but also in the medical field. Using the principle of photobiomodulation, light can be used for the treatment of many diseases, such as skin aging, wrinkles, acne, rosacea, sunburns, and so on. In addition, some research suggests that when people are under a special lighting system, they not only improve sleep quality and reduce sleepy ratings, but also improve vigilance and mood. Therefore, with the advancement of lighting technology, the application of lighting has extended to different aspects, bringing many advantages to human life.