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Construction
The art, trade, or work of building.
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Construction > Lighting
voltage
Construction; Lighting
The difference in electrical potential between two points of an electrical circuit.
color temperature
Construction; Lighting
The color temperature is a specification of the color appearance of a light source, relating the color to a reference source heated to a particular temperature, measured by the ...
ballast efficiency factor (BEF)
Construction; Lighting
The ballast factor divided by the input power of the ballast. The higher the BEF within the same lamp-ballast type, the more efficient the ballast.
ballast factor
Construction; Lighting
The ballast factor (BF) for a specific lamp-ballast combination represents the percentage of the rated lamp lumens that will be produced by the combination.
shielding angle
Construction; Lighting
The angle measured from the ceiling plane to the line of sight where the bare lamp in a luminaire becomes visible. Higher shielding angles reduce direct glare. It is the ...
specular
Construction; Lighting
Mirrored or polished surface. The angle of reflection is equal to the angle of incidence. This word describes the finish of the material used in some louvers and reflectors.
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