Lights & lighting

Lights & lighting

Any device used for illumination, either for practical use or deliberate aesthetic effect.

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Lights & lighting > Lighting products

compact fluorescent lamp (CFL)

Lights & lighting; Lighting products

The general term applied to fluorescent lamps that are single-ended and that have smaller diameter tubes that are bent to form a compact shape. Some CFLs have integral ballasts ...

cool white

Lights & lighting; Lighting products

A term loosely used to denote a color temperature of around 4100 K. The Cool White (CW) designation is used specifically for T12 and other fluorescent lamps using halophosphors ...

coolbeam

Lights & lighting; Lighting products

(See DICHROIC REFLECTOR)

core

Lights & lighting; Lighting products

Component of electromagnetic ballast that is surrounded by the coil. Core is comprised of steel laminations or solid ferrite material.

cosine-corrected

Lights & lighting; Lighting products

An illuminance meter that measures the light level correctly irrespective of the angle the light is coming from. (See ILLUMINANCE METER)

cost of light

Lights & lighting; Lighting products

Usually refers to the cost of operating and maintaining a lighting system on an ongoing basis. The 88-8-4 rule states that (typically) 88% is the cost of electricity, 8% is labor ...