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Key Terms
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Average Rated Lamp Life-
The length of time declared by the manufacturer at which 50% of any large number of lamps reaches the end of their individual lives.
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| CFL- Compact Fluorescent Lighting |
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Correlated Color Temperature (CCT)-
The color appearance, or actual color of the lamp is called the color temperature and is defined in terms of the spectral tri-stimulus values (color coordinates) according to the recommendations of IESNA LM-16. For color coordinates near the Black Body loci, the correlated color temperature, measured in Kelvin (K), is used.
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CRI-
Color Rendering Index. Defined in terms of a comparison of the spectral tri-stimulus values of the objects under test illumination and standard illumination according to the recommendations of CIE Publication No. 13.3-1995.
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GPM-
Gallons per Minute
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Kelvin-
In lighting, Kelvin is the unit of measure for Color Temperature used to indicate the overall color of the light produced from a source. The higher the Kelvin, the whiter the light.
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Lumen-
A measure of the luminous flux or quantity of light emitted by a source.
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Lumen maintenance-
The luminous flux or lumen output at a given time in the life of the lamp and expressed as a percentage of the initial luminous flux.
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Outdoor Reflector-
A reflector CFL that is primarily marketed for use in outdoor applications and is safety listed for wet locations.
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PSI-
Pressure per square inch.
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Rated Luminous Flux or Lumen OUtput- Initial lumen rating (based on the average 100-hour lumen output measurement), which is specified by the manufacturer.
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UL-
Underwriters Laboratories
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