1 Terms
Contributors in Lighting
Lighting
Radio frequency interference (RFI)
Construction; Lighting
Interference to the radio frequency band caused by other high frequency equipment or devices in the immediate area. Fluorescent lighting systems generate RFI.
Ultra violet (UV)
Construction; Lighting
Invisible radiation that is shorter in wavelength and higher in frequency than visible violet light (literally beyond the violet light).
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 louvres and reflectors.
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 ...
Compact fluorescent
Construction; Lighting
A small fluorescent lamp that is often used as an alternative to incandescent lighting. The lamp life is about 10 times longer than incandescent lamps and is 3-4 times more efficacious.
