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The temperature of the ideal emitter that matches the color most closely is defined as the color temperature of the original visible light source. The color temperature scale describes only the color of light emitted by a light source, which may actually be at a different (and often much lower) temperature. [1] [2]
Variable color temperature LED array in a floodlamp. Color rendering is not identical to that of incandescent lamps, which emit close to perfect black-body radiation, as does the sun. A measurement unit called CRI is used to record how a light source renders eight color sample chips, on a scale from 0 to 100. [106]
The color of the light ... quite separate from color temperature. An orange or cyan object could appear with the wrong color and much darker as the LED or phosphor ...
The best LED light bulbs are "a near-dupe for classic soft white ... Warm white lights will always be cooler than blue-toned white lights. Color temperature is measured in degrees of Kelvin on a ...
CRI is calculated from the differences in the chromaticities of eight CIE standard color samples (CIE 1995) when illuminated by a light source and by a reference illuminant of the same correlated color temperature (CCT), commonly measured in kelvins, indicating the light color produced by a radiating black body at a certain temperature; the smaller the average difference in chromaticities, the ...
Researchers use daylight as the benchmark to which to compare color rendering of electric lights. In 1948, daylight was described as the ideal source of illumination for good color rendering because "it (daylight) displays (1) a great variety of colors, (2) makes it easy to distinguish slight shades of color, and (3) the colors of objects around us obviously look natural".