D65 D50 TL83 TL84 U30 U35 Fluorescent Tube Light 60cm Length With Different Color Temperature

Fluorescent Light Tube D65 D50 TL83 U30 Different Color Temperature

CIE Standard Illuminant D65 (sometimes written D65[1][2]) is a commonly used standard illuminant defined by the International Commission on Illumination (CIE).[3] It is part of the D series of illuminants that try to portray standard illumination conditions at open-air in different parts of the world.

D65 corresponds roughly to the average midday light in Western Europe / Northern Europe (comprising both direct sunlight and the light diffused by a clear sky), hence it is also called a daylight illuminant. As any standard illuminant is represented as a table of averaged spectrophotometric data, any light source which statistically has the same relative spectral power distribution (SPD) can be considered a D65 light source. There are no actual D65 light sources, only simulators. The quality of a simulator can be assessed with the CIE Metamerism Index.[4][5]

The CIE positions D65 as the standard daylight illuminant:

[D65] is intended to represent average daylight and has a correlated colour temperature of approximately 6500 K. CIE standard illuminant D65 should be used in all colorimetric calculations requiring representative daylight, unless there are specific reasons for using a different illuminant. Variations in the relative spectral power distribution of daylight are known to occur, particularly in the ultraviolet spectral region, as a function of season, time of day, and geographic location.

— ISO 10526:1999/CIE S005/E-1998, CIE Standard Illuminants for Colorimetry

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.