Lighting refers to the use of light sources to provide illumination for people to work, study, play and other activities. It is also a form of art that affects people emotionally and physically. The use of lighting dates back thousands of years. Ancient humans mainly used natural light sources such as the sun, fire or oil lamps to see in the dark. Today, however, we have access to a wide range of artificial lighting technologies that provide us with more efficient and brighter illumination. Various types of lighting fixtures are used to provide light in our homes and buildings. The most commonly used fixtures are ceiling lights and wall lights, with each producing different levels of brightness. Other fixtures such as spotlights, recessed lights, and desk lamps help to provide a specific area with illumination. The position of a light fixture is often important to ensure that it provides the desired level of illumination and light distribution. Wall-mounted lights are typically more efficient than those mounted in the ceiling, and can provide more directional lighting. In addition to illuminating living spaces, lighting is also used to create atmosphere and ambiance. Specialized fixtures such as string lights, rope lights, and LED light strips can be used for decorative purposes. Accent lighting also can help to draw attention to a particular area or object. Regardless of the type of lighting you use, it is important to ensure that it is energy efficient. Replacing traditional light bulbs with LED bulbs can help to save energy and money. It also is important to remember that lighting can have a significant impact on our health, so it is important to select fixtures that are designed to reduce eye strain and fatigue.