Lighting or illumination is the deliberate use of light to achieve practical or aesthetic effects. Lights includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting (using windows, skylights, or light shelves) is sometimes used as the main source of light during daytime in buildings. This can save energy in place of using artificial lights, 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.

Indoor lights is usually accomplished using light fixtures, and is a key part of interior design. Lights can also be an intrinsic component of landscape projects.

Lights is the innovation of enlightening a territory, for the most part by fake sources, for example, a light or electric lamp. Lights configuration is worried about enlightenment in various settings, for example, structural lighting and showy lights.