Lighting, or illumination, is the intentional 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 (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 lighting, which represents a major component of energy consumption in buildings. The process of selecting, designing, and implementing a lighting solution takes into account a variety of factors, including energy efficiency, cost, color rendering, brightness, and design. Specialized lighting techniques have been developed to address some of these factors. For example, light-emitting diode (LED) lighting has become increasingly popular because of its reduced energy consumption and increased efficiency. Lighting designers may also employ techniques, such as lighting design software, to ensure that their designs are energy efficient and meet other requirements. Lighting is often a critical component of interior design and is used to create an atmosphere and provide functionality. Different types of lighting may be used to focus on specific areas and emphasize certain objects or to set the mood and ambiance of a room. As a result, lighting is regularly used to create illusions in entertainment and architectural installations. For example, in theatre lighting, lighting designers often use lighting to specific and dramatic effect. Lighting in the home and workplace has changed significantly in recent years, as technological advancements and energy efficiency concerns have driven the development of new lighting solutions. Today, homeowners and business owners have access to more efficient LED and other lighting sources, as well as increasingly sophisticated lighting controls that allow users to adjust the lighting in a space to meet their needs.