what is illumination

Illumination refers to the deliberate use of light to achieve practical or aesthetic effects. It includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting, which is the use of windows, skylights, or light shelves, is sometimes used as the main source of light during the daytime in buildings to save energy in place of using artificial lighting, which represents a major component of energy consumption in buildings. Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants. Illumination can also refer to an understanding or a spiritual awareness, like when a mystery of your faith suddenly makes sense to you.