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Lumisys® > Support > Lighting Control Glossary > B
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A Lamps
The most common incandescent household lamp; a standard general service lamp.
Advanced Application Controller (AAC)
A fully programmable control module. This control module may be capable of some of the advanced features found in Building Controllers (storing trends, initiating read and write requests, etc.) but it does not serve as a master controller. Advanced Application Controllers may reside on either the Ethernet/IP backbone or on a subnet.
Accent Lighting
Localized and directional lighting used to highlight, focus attention or dramatize a room or outdoor space. As part of a decorating scheme, it is used to spotlight paintings, houseplants and other possessions, or to highlight the texture of a wall, drapery or outside landscaping. Accent lighting requires at least three times as much light on the focal point as the general lighting around it.
Aiming Angle
How you point or direct an adjustable light. The aiming angle is calculated from vertical or nadir. An aiming angle of 30 degrees is effective for paintings and/or sculptures.
Alabaster
Shades can be made of either alabaster stone or alabaster glass. Alabaster stone is much like marble in that it is quarried, cut and made into shades and bowls. It creates a warm, rich look, with each piece being completely unique. Stone is very expensive, however, so many lighting pieces recreate the look with more affordable alabaster glass.
Alzak
The trade name used for a method of anodizing. Now a generic term for brightened, anodized aluminum.
Alternating Current (AC)
Flow of electricity which cycles or alternates direction many times per second. The number of cycles is referred to as frequency. Most common frequency used in this country is 60 Hertz (cycles per second).
Ambient Lighting
Also known as general lighting, ambient lighting provides an area with overall, non-specific illumination. Ambient lighting radiates a comfortable level of brightness, enabling one to see and walk about safely. It can be accomplished with chandeliers, ceiling or wall-mounted fixtures, recessed or track lighting or with outdoor fixtures. A basic form of lighting that replaces sunlight, ambient lighting is fundamental to lighting a home.
Amperes / amps
The unit of measurement of electrical current.
Aperture
Opening of a fixture through which light exists.
Application Specific Controller (ASC)
A pre-programmed control module which is intended for use in a specific application. ASCs may be configurable, in that the user can choose between various pre-programmed options, but it does not support full custom programming. ASCs are often used on terminal equipment such as VAV boxes or fan coil units. In many vendors' architectures ASCs do not store trends or schedules but instead rely upon a Building Controller to provide those functions
Architectural Lighting
This broad term generally refers to built-in fixtures, such as downlighting, valance lighting or a luminous ceiling. Some people also include functional lighting, such as track or simple fluorescent, which has an architectural appearance.
Argon
Inert gas used in incandescent and fluorescent lamps. In incandescents, argon helps retard the evaporation of the tungsten filament.
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
1791 Tullie Circle, NE
Atlanta, GA 30329-2305
Visit ASHRAE: http://ashrae.org/
ASME
American Society of Mechanical Engineers
Three Park Avenue
New York, NY 10016-5990
ASTM
ASTM International
100 Barr Harbor Drive
West Conshohocken, PA 19428-2859
A standards development organization that serves as an open forum for the development of international standards.
Average Rated Life
The number of hours required for half of a large group of lamps to fail or burn out. The actual life of any lamp or small group of lamps will typically be different from the average rated life.
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