Directional lighting

ambient lighting

Light that comes from all directions. Contrast with "directional lighting," which is made up of a light source with parallel light rays that do not diminish with distance. Also, contrast with "positional lighting," in which the rays are not parallel, but diminish in intensity from the source.

Primary Light Sources
Ambient lighting comes from all directions, while directional and positional lighting come from one source. (Image courtesy of Intergraph Computer Systems.)
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Directional lighting

Produced mainly by adjustable sources, providing light from a particular direction.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

directional lighting

Lighting, predominantly from a preferred direction, which provides illumination on the work plane or on an object.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Safety features include a blue LED directional spotlight, front and side safety-rated laser bumpers, look down sensors to prevent and blind spots, LED directional lighting, warning sirens, soft stops for controlled stops and e-stops.
The Hawks face Glenbard East under the lights as the District U-46 high school debuts a new $1.5 million on-campus athletic facility, which includes grandstand seating for 1,500, LED directional lighting and a press box.
7 Achieve a cozy ambiance through the use of soft and accent directional lighting; soft, plump throw pillows with a theme color and patterns; floral arrangement; and well-selected personal artifacts, books, candles and artworks that reflect the client's taste.
The installer and end-user can design their own lighting environment with bright, directional lighting for safety and security, and enhanced staff and visitor comfort - by simply taking advantage of the many possible configurations and adjustable angles.
Traditionally mounted at just 8 feet high, parking garage lighting is particularly challenging for directional lighting like LEDs.
The work includes replacing airfield lighting signs and the directional lighting that guides pilots to one of the airport's three runways, Anthony said.
Of course the head and facial features are well-covered in the third section, with a helpful treatment of directional lighting.
Directional lighting for the camera is supplied by a field replaceable, high intensity, 24 white LED lighting module.
Some models in the collection incorporate the flexibility of choosing between lantern and flashlight functionality, for area or directional lighting in the woods, the garage or the backyard."
While most rooms have a central fitting to provide the main source of light, soft lighting, or directional lighting for reading comes from lamps.

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