Lighting, often referred to as illumination, is the intentional application of light to a space in order to achieve some aesthetic or practical effect. Lighting includes the use of both artificial light sources, such as lamps, and the natural illumination of interiors with daylight. Indoor lighting is a form of fixture or furnishing and a key
part of interior design and architecture. Proper lighting can enhance task performance and aesthetics, whereas poorly designed lighting may result in wasted energy and adverse health effects