Lighting is an important part of building interiors and plays an important role in people's daily life. Good lighting can give people a bright and comfortable space to work and rest. Lighting is composed of two parts: natural lighting and artificial lighting. Natural lighting makes use of sunlight to illuminate the interior space of a building and can effectively reduce the energy consumption of artificial lighting. But the intensity and direction of natural light change with the season, day and night, and other factors, so the effect of natural light is unstable. Artificial lighting, including incandescent lamps, fluorescent lamps, gas discharge lamps and so on, is the main light source of light in modern architectural interior spaces. Different lighting sources have different effects. Incandescent lamps have strong red and soft light. Good for indoor living and entertainment, it's not suitable for lighting of local area or reading. Fluorescent lamps have good energy saving, fast response, strong illuminance and low prices. But the fluorescent lamp gives people a feeling of coolness and discomfort, and the visual effect is worse than the incandescent lamp. LEDs have high luminous efficiency and good color rendering, but their service life is short and the price is high. The three lighting sources are used cleverly according to the use of the indoor space. Based on the characteristics of the lighting source, a reasonable lighting scheme is designed. Properly using artificial lighting can make modern buildings look more vibrant, warm and full of vitality.