Lighting is an indispensable part of our daily life and has a profound impact on our mood and our physical and mental health. It is widely accepted that lighting should follow certain principles. First of all, natural light should be used as much as possible. As sunlight rays are free from artificial light sources, natural lighting in living areas is highly recommended to improve room temperature and enhance the air quality. Secondly, adequate lighting is important to maintain both safety and comfort in any environment. For residential spaces and workplaces, suitable illumination can boost productivity and improve the quality of peoples living. Thirdly, think about the human eyes response to different lighting before choosing the right one. Different types of lighting need to be used in a specific room according to the purpose, such as bright lights for reading and soft ones for creating a cozy atmosphere. Finally, selective lighting with appropriate positioning can help produce its desired effect and satisfy peoples need. Good lighting can seamlessly indicate passing time, balance the atmosphere of various activities, create a positive atmosphere, and form a harmonious living environment. In conclusion, effective lighting is essential for a safe, comfortable, and healthy environment.