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Construction
The art, trade, or work of building.
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Construction > Lighting 
vandal-resistant
Construction; Lighting
Fixtures with rugged housings, break-resistant type shielding, and tamper-proof screws.
light loss factor (LLF)
Construction; Lighting
Factors that allow for a lighting system's operation at less than initial conditions. These factors are used to calculate maintained light levels. LLFs are divided into two ...
low power factor
Construction; Lighting
Essentially, an uncorrected ballast power factor of less than 0.9 (SEE NPF)
footlambert
Construction; Lighting
English unit of luminance. One footlambert is equal to 1/p candelas per square foot.
occupancy sensor
Construction; Lighting
Control device that turns lights off after the space becomes unoccupied. May be ultrasonic, infrared or other type.
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