Glossary
For your reference, we have created a glossary of frequently used
lighting-related terms and phrases. To move ahead to a specific section, click
on the first letter of word you are interested in, or use your browser's 'Find'
function to search this page.
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AC (Alternating Current)
Current that passes from the generator in one direction and then the other, alternately.
Ambient sound levels
Background noise generated by electrical and mechanical equipment operating in a building. Low ambient sound levels are desirable for hospitals, libraries and similar applications where high noise levels are unacceptable.
Ambient Temperature
The temperature of the atmosphere of surrounding environment.
Amperes ("Amps")
A measure of electrical current.
ANSI (American National Standards Institute)
Group that generates product performance standards for many U.S. industries.
ANSI Watts
Measurement of electrical power used by the ballast and lamps when tested per ANSI standards.
Anti-Arc
Circuitry used to restart the lamps without resetting the power to the ballast.
Anti-Striation
Circuitry used to prevent striations or spiraling in energy saving lamps due to low temperature or low current operation
Arc (Arc Tube)
Intense luminous discharge formed by the passage of electric current across a space between two electrodes.
Arcing of output leads
Generation of an electrical arc between output leads of a ballast or output leads to ground.
Asphalt silica sand mixture
A mixture of asphalt and silica sand used to fill the cases of electromagnetic and electronic ballasts to dampen sound, protect from moisture, improve heat removal and increase reliability.
Auto-Restrike
Circuitry used to restart the lamps without resetting the power to the ballast.
Autotransformer
A tapped winding transformer that changes the voltage available locally to the voltage required by a particular load.
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