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Lighting products
Industry: Lights & lighting
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Lighting products
Radiation
Lights & lighting; Lighting products
A general term for the release of energy in a "wave" or "ray" form. All light is radiant energy or radiation, as is heat, UV, microwaves, radio waves, etc.
Rapid start
Lights & lighting; Lighting products
Lamp starting method in which lamp filaments are heated while open circuit voltage (OCV) is applied to facilitate lamp ignition.
Rapid start circuit
Lights & lighting; Lighting products
A fluorescent lamp-ballast circuit that utilises continuous cathode heating, while the system is energized, to start and maintain lamp light output at efficient levels. Rapid start ballasts may be ...
Rapid start lamp
Lights & lighting; Lighting products
A fluorescent lamp with two pins at each end connected to the filament. The filaments are heated by the ballast to aid in starting. Some rapid start lamps may be instant started without filament ...
Rated lamp life
Lights & lighting; Lighting products
For most lamp types, rated lamp life is the length of time of a statistically large sample between first use and the point when 50% of the lamps have died. It is possible to define "useful life" of a ...
Reflectance
Lights & lighting; Lighting products
The ratio of light reflected from a surface to that incident upon it.
Reflector lamp (R)
Lights & lighting; Lighting products
A light source with a built-in reflecting surface. Sometimes, the term is used to refer specifically to blown bulbs like the R and ER lamps; at other times, it includes all reflectorized lamps like ...
