D65 / UV Fluorescent Tube Light 6500K Color Temperature For Color Assessment Cabinet
Product Details
| Color Temperature: | 6500K, 5000K, 4000K, 3500K | Length: | 60cm, 90cm, 120cm, 150cm |
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| Highlight |
long fluorescent tubes,fluorescent tube lamp |
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Product Description
Standard Color Temperature Light Tube D65 D50 UV Light Sources Tube Accessory for Color Assessment Light Cabinet
CIE illuminants
The International Commission on Illumination (usually abbreviated CIE for its French name) is the body responsible for publishing all of the well-known standard illuminants. Each of these is known by a letter or by a letter-number combination.
Illuminants A, B, and C were introduced in 1931, with the intention of respectively representing average incandescent light, direct sunlight, and average daylight. Illuminants D represent phases of daylight, Illuminant E is the equal-energy illuminant, while Illuminants F represent fluorescent lamps of various composition.
There are instructions on how to experimentally produce light sources ("standard sources") corresponding to the older illuminants. For the relatively newer ones (such as series D), experimenters are left to measure to profiles of their sources and compare them to the published spectra:
At present no artificial source is recommended to realize CIE standard illuminant D65 or any other illuminant D of different CCT. It is hoped that new developments in light sources and filters will eventually offer sufficient basis for a CIE recommendation.
— CIE, Technical Report (2004) Colorimetry, 3rd ed., Publication 15:2004, CIE Central Bureau, Vienna
Nevertheless, they do provide a measure, called the Metamerism Index, to assess the quality of daylight simulators. The Metamerism Index tests how well five sets of metameric samples match under the test and reference illuminant. In a manner similar to the color rendering index, the average difference between the metamers is calculated.
Product Highlights
Standard Color Temperature Light Tube D65 D50 UV Light Sources Tube Accessory for Color Assessment Light Cabinet CIE illuminants The International Commission on Illumination (usually abbreviated CIE for its French name) is the body responsible for publishing all of the well-known standard illuminant...
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