Lighting, also known as illumination, is the deliberate use of light to achieve a practical or aesthetic effect. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting is often used as the main source of light during daytime in buildings. Good lighting is important in design and architecture where the proper lighting can change the look and feel of a space, it can also provide safety and improve mood. Lighting can be divided into four main categories; general, task, accent and decorative. General lighting is a form of lighting used to illuminate an entire space. Task lighting is lighting used to help with specific tasks such as working on a desk or a kitchen counter. Accent lighting is used to highlight certain features of a room such as artwork or an architectural element. Decorative lighting can transform a room or create a mood. The choice of lighting can have a significant impact on the energy consumption of a building. Poorly chosen or inappropriate lighting can not only create a dingy atmosphere, it can be an inefficient use of energy. When selecting lighting, it is important to consider factors such as light color, amount of light needed, and type of lightbulb used. LED lighting is an energy-efficient option that is gaining in popularity. In conclusion, good lighting can improve the aesthetic of a room and provide mood and safety benefits. It can also improve the energy efficiency of a building if chosen and used properly.