The measure of luminous intensity of a source in a given direction. The term has been retained from the early days of lighting when a standard candle of a fixed size and composition was defined as producing one candela in every direction. A plot of intensity versus direction is called a candela distribution curve and is often provided for reflectorized lamps and for luminaires with a lamp operating in them.
The luminous intensity as defined by the international metric standard (SI). The term, retained from the early days of lighting, defines a standard candle of a fixed size and composition as a basis for evaluating the intensity of other light sources.
cd]. A unit for measuring luminous intensity. One candela is approximately equal to the amount of light energy generated by an ordinary candle. Since 1948 a more precise definition of a candela has become: the luminous intensity of a black body heated up to a temperature at which platinum converges from a liquid state to a solid.
The candela ( abbreviation, cd) is the standard unit of luminous intensity in the International System of Units. Originally, luminous intensity was measured in terms of units called candles. This was based on the approximate amount of light emitted by a candle flame. Late in the 20th century, the current definition and terminology was adopted to allow for consistent and repeatable measurements of light. The term candela also refers to candle power, 1 candela = 1 candlepower. Candela is formally defined as the magnitude of an electromagnetic field, in a specified direction, that has a power level of 1/683 watt (1.46 x 10-3 W) per steradian at a frequency of 540 terahertz (540 THz or 5.40 x 1014 Hz).
The unit of measure indicating the luminous intensity (candlepower) of a light source in a specific direction; any given light source will have many different intensities, depending upon the direction considered.
This is the initial unit of light specification. It is the luminous intensity. One candela is defined as a small white-hot cavity. It is actually equal to about 1 large wax candle. (Hence candela / candle).
the S.I. unit of luminous intensity. One candela is defined as the luminous intensity of 1/60cm2 of a black body radiator operating at the temperature of solidification of platinum. Also called candle.
The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. The number 683 makes the value identical to that obtained with the previous version of the unit: the emission from 1 square centimeter of glowing, solidifying platinum. See also Cd/m2.
The international unit (SI) of luminous intensity. The term has evolved from considering a standard candle, similar to a plumber's candle, as the basis of evaluating the intensity of other light sources. Sometimes the term "candlepower" is used to describe the relative intensity of a source. (See Lumen.)
Metric unit for luminous intensity. The unit used to express the intensity of light visible to the human eye. It corresponds to the emission from 1/60th of a square centimeter of a black body operating at the solidification temperature of platinum, and emitting one lumen per steradian.
The international unit (SI) of luminous intensity. The term has been retained from the early days of lighting when a standard candle of a fixed size and composition was used as a basis for evaluating the intensity of other light sources. Sometimes the term "candle power" is used to describe the relative intensity of a source.
A unit of measurement of light intensity of light. An ordinary wax candle generates one candela. More precisely, candela is the luminous intensity of a monochromatic source which has a frequency of 540x1012 Hz. A typical LED bulb's brightness is measured in millicandela or mcd, while a LED display's brightness is measured in NIT.
A unit of measurement for the luminous intensity of a lamp at a specific spot in the beam. Dichroic A glass reflector and bulb assembly that allows heat to dissipate through the reflector and away from the bulb thus increasing bulb life.
Abbr. cd. A unit of luminous intensity equal to 1/60 of the luminous intensity per square centimeter of a blackbody radiating at the solidification temperature of platinum. Also called "candle" or "standard candle" or "new candle".
The candela (symbol: cd) is the SI base unit of luminous intensity (that is, power emitted by a light source in a particular direction, with wavelengths weighted by the luminosity function, a standardized model of the sensitivity of the human eye).
Candela, a San Francisco-based nine piece salsa music band created in 1987 under the direction of Uruguayan born lead singer and conga drummer Edgardo CambÃ³n. It consists of piano, bass, trombones, conga drums, bongo drums, timbales and vocals .