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.

ThreeNH is a group, including four companies as following:

Shenzhen 3nh Technology Co., Ltd

Shenzhen Sine Image Technology Co., Ltd

Shenzhen Tilo Technology Co., Ltd
COLORCONTROLLER HK LIMITED

3nh(ThreeNH) & TILO have 8 product lines to manufacture different kinds of models Spectrophotometer,Colorimeter,Gloss Meter,Color Light Box,Resolution Test Chart with high quality and high accuracy.

Technological innovation is the source for 3nh(ThreeNH) & TILO development. 3nh(ThreeNH) & TILO have a high educated R&D team striving for perfection, advanced technology and teamwork.

Quality is a very important part of our company, and every instrument of 3nh(ThreeNH) & TILO will be checked by our QC department. Only QC pass, all instruments will go to warehouse for shipment.

3nh adheres to “people-oriented, customer first, technological innovation, sustainable development” business philosophy to meet customer demand continuously, to create value for customers and to achieve win-win situation and common development.

Service Concept:

* Focus on color for 20 years to make it better.

* Integrity wins the world.

* Continuous research and development innovation for excellence.

* Constantly create value for customers.