20 Terms
Contributors in Lighting
Lighting
ballast cycling
Construction; Lighting
Undesirable condition under which the ballast turns lamps on and off (cycles) due to the overheating of the thermal switch inside the ballast. This may be due to incorrect lamps, improper voltage ...
candela
Construction; Lighting
Unit of luminous intensity, describing the intensity of a light source in a specific direction.
troffer
Construction; Lighting
The term used to refer to a recessed fluorescent light fixture (combination of trough and coffer).
life-cycle cost
Construction; Lighting
The total costs associated with purchasing, operating, and maintaining a system over the life of that system.
watt (W)
Construction; Lighting
The unit for measuring electrical power. It defines the rate of energy consumption by an electrical device when it is in operation. The energy cost of operating an electrical device is calculated as ...
recessed
Construction; Lighting
The term used to describe the doorframe of a troffer where the lens or louver lies above the surface of the ceiling.
volt
Construction; Lighting
The standard unit of measurement for electrical potential. It defines the "force" or "pressure" of electricity.
