5 Terms
Contributors in Lighting
Lighting
high-bay
Construction; Lighting
Pertains to the type of lighting in an industrial application where the ceiling is 20 feet or higher. Also describes the application itself.
cut-off angle
Construction; Lighting
The angle from a fixture's vertical axis at which a reflector, louver, or other shielding device cuts off direct visibility of a lamp. It is the complementary angle of the shielding angle.
electromagnetic interference (EMI)
Construction; Lighting
High frequency interference (electrical noise) caused by electronic components or fluorescent lamps that interferes with the operation of electrical equipment. EMI is measured in micro-volts, and can ...
regulation
Construction; Lighting
The ability of a ballast to hold constant (or nearly constant) the output watts (light output) during fluctuations in the voltage feeding of the ballast. Normally specified as +/- percent change in ...
semi-specular
Construction; Lighting
Term describing the light reflection characteristics of a material. Some light is reflected directionally, with some amount of scatter.
diffuse
Construction; Lighting
Term describing dispersed light distribution. Refers to the scattering or softening of light.
retrofit
Construction; Lighting
Refers to upgrading a fixture, room, or building by installing new parts or equipment.
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Category: Education 1 20 Terms
20 Terms