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Lighting products
Industry: Lights & lighting
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Lighting products
high power factor
Lights & lighting; Lighting products
A ballast whose power factor is corrected to 90% or greater by the use of a capacitor.
high-bay lighting
Lights & lighting; Lighting products
Lighting designed for (typically) industrial locations with a ceiling height of 25 feet and above.
high-pressure sodium (HPS) lamp
Lights & lighting; Lighting products
HPS lamps are high intensity discharge light sources that product light by an electrical discharge though sodium vapor operating at relatively high pressures and temperatures. GE markets these lamps ...
hot restart time
Lights & lighting; Lighting products
Time it takes for a High Intensity Discharge lamp to reach 90% of light output after going from on to off to on.
ignitor
Lights & lighting; Lighting products
An electronic device providing a high voltage pulse to initiate an electrical discharge. Typically, the ignitor is paired with or is a part of the ballast (See STARTER).
illuminance
Lights & lighting; Lighting products
The "density" of light (lumens/area) incident on a surface; i.e. the light level on a surface. Illuminance is measured in footcandles or lux.
illuminance meter
Lights & lighting; Lighting products
A device that measures the illuminance at a location calibrated either in footcandles or in lux. (Also know as a light meter -- See COSINE CORRECTED)
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