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Ambient lighting may refer to:
1. The light in an environment
2. Low-key lighting photographic technique using a single key light
3. A type of lighting in computer graphics
In a basic illumination model, the general level of brightness can be set for a scene. This is a simple way to model the combination of light reflections from various surfaces to produce a uniform illumination called the ambient light, or background light. Ambient light has no spatial or directional characteristics. The amount of ambient light incident on each object is a constant for all surfaces in all directions.
Often task lighting refers to increasing to better accomplish a specific activity. However, the illuminance level is not the only factor governing visibility. Contrast is also important, and a poorly positioned light source may cause contrast reduction, resulting in loss of visibility. The most important purpose of task lighting in the office is not increasing illuminance, but improving contrast. General lighting can be reduced because task lighting provides focused light where needed. There are also other approaches to task lighting, for example under-shelf luminaires. Different strategies for task lighting exist.
Accent lighting focuses light on a particular area or object.
It is often used to highlight art or other artifacts. Common types
of accent lights include wall sconces, floodlights, recessed
lights, torch lamps, or track lighting. The brighter light from
the accent lamp creates visual interest to a room. Accent lights
may also be used to shine light on a stairway, or as in movie
theaters, light a walkway.
Some accent lights aren't made to shine on a particular object, but are themselves a piece of art with a self-contained light source. Often made with Tiffany glass, these serve as a piece of functional decor for a home. Accent lights can also be used outdoors as guides for pathways or to spotlight garden art.