Lighting is the science and technology of illumination. It includes the design of lighting systems which use multiple types of lights and their control, including the selection of colors, lighting intensities, and the intensity of natural light. Lighting also involves the creation of illuminance, the design of lighting fixtures, and the controlling of lighting levels. The purpose of lighting is to create light for visual tasks such as reading, communication, navigation, and decoration. Lighting can also be used for emotional and psychological effects; for example, in a living room or bedroom, lighting can provide a relaxed, peaceful atmosphere. Lighting systems vary depending on the application. Interior lighting, for example, is often direct, while exterior lighting requires diffused illumination. The range of light sources available can vary significantly, from incandescent lamps, stadium and flood lights to LEDs and sensors. Lights can be used to enhance the ambiance of a space, add safety and visibility, and create interesting visual effects. Lighting is often overlooked in the design of spaces, but it can make a big difference in how a space looks and feels. Lighting can be used to emphasize an area or set a mood, while providing a functional purpose. Properly designed lighting systems can also reduce energy costs and can provide safety and security. Overall, lighting provides illumination, safety, and a sense of ambiance, making it an important element in the design of any space.