a fundamental unit derived from black body radiation at set conditions in a given direction. Unit: candela
The luminous flux in a given direction (from a reflector lamp, for example). The unit is the candela (one lumen per steradian).
Luminous intensity is a measure of light at a source emitted in a certain direction. It is expressed in candelas.
the amount of light or brightness that is given off by a light source, measured in candelas.
Luminous Intensity is equal to the amount of luminous flux emitted into a very small solid angle at a defined angular orientation from the light source. The measurement for luminous intensity is the lumen or candela.
A measure of the visibility of a light source generally expressed in candelas. It is defined as luminous flux per unit solid angle (steradian) in a given direction.
luminous flux per solid angle, either emitted or reflected from a point. Measured in lumen s per steradian, or candela.
The part of luminous flux that radiates in a particular direction is measured in candela (cd). Luminous intensity is an important quality to define efficiency and quality of lighting equipment. Luminous intensity is measured using detectors with a defined field of view under point source conditions where the light source to detector distance is at least five times greater than the largest source dimension Formula: cd = lm / sr lm = lumens sr = steradian or solid angle
The amount of luminous flux emitted into a very small solid angle at a defined angular orientation from the light source. The unit of luminous intensity is the lumen/steradian (lm/sr), or candela (cd).
The intensity (flux per unit solid angle) of visible radiation weighted to take into account the variable response of the human eye as a function of the wavelength of light. Usually expressed in candles.
A quantity which describes the power of a source or illuminated surface to emit light in a given direction. It is the luminous flux emitted in a narrow cone containing the given direction divided by the solid angle of the cone: the result is expressed in candelas. Products: Power Analyzers VPN 98-030 V03 Page 49 Voltech Application Note 101
In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.