Lighting is the deliberate use of light to achieve a practical or aesthetic effect. The most common use of lighting is for illumination, which can be either natural or artificial. Natural light is created through sunlight entering a space. Artificial light is typically supplied by light fixtures. Lighting is a crucial part of interior design. A room without lighting is dark and not inviting. Light affects how people perceive a space, which affects how they interact in that space. Environmental lighting sets the mood and feeling of a room, while task lighting helps the user to navigate and perform operations in that room. Task lighting can also help to reduce eye strain and improve visibility. Besides practical applications, lighting can be used for aesthetic purposes as well. Many people enjoy the warmth and atmosphere of pale lighting for living rooms, bright and bold lighting for commercial spaces, and special lighting for events. With all these uses of lighting, its easy to see why its such an important part of interior design. Lighting has the power to transform a space into a vibrant, inviting environment that serves all the needs of its occupants.