Provide front side light to the performance area. The angle of view of a person is most sensitive to the changes of the side light. The side light is the main light of the light-receiving surface of the character and the scene, an important tool for modeling; the modeling is the main lighting supplemented by vertical lighting; because of the vertical lighting, there are no less than 2 horizontal light. The front area of the slap lighting is the main area, with the surface light, forming the effect of light and dark changes. The horizontal angle between the slap to the half-depth of the stage and the central axis of the stage is not more than 45 degrees.