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GB/T 7922: Historical versions
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| GB/T 7922-2023 | English | 419 |
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Method of measuring color of light sources
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| GB/T 7922-2008 | English | 479 |
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3 days [Need to translate]
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Method of measuring the color of light sources
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| GB/T 7922-2003 | English | 399 |
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Method of measuring the color of light sources
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| GB/T 7922-1987 | English | 359 |
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Methods of measuring the colour of light source
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Basic data
| Standard ID | GB/T 7922-2023 (GB/T7922-2023) |
| Description (Translated English) | Method of measuring color of light sources |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | A26 |
| Classification of International Standard | 17.180.20 |
| Word Count Estimation | 20,286 |
| Date of Issue | 2023-05-23 |
| Date of Implementation | 2023-09-01 |
| Older Standard (superseded by this standard) | GB/T 7922-2008 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 7922-2023: Method of measuring color of light sources
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 17:180:20
CCSA26
National Standards of People's Republic of China
Replacing GB/T 7922-2008
Method for measuring the color of lighting sources
Released on 2023-05-23
2023-09-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Measurement method 1
4:1 Classification of measurement methods 1
4:2 Light source color evaluation index 1
4:3 Measurement conditions 2
4:4 Measuring instruments 2
4:5 Measured light source and setting 3
4:6 Laboratory measurements 3
4:7 On-site measurement 5
5 Processing of measurement results 5
5:1 Calculation of total spectral radiant flux 5
5:2 Calculation of tristimulus values 6
5:3 Calculation of chromaticity coordinates 6
5:4 Calculation of color evaluation items of white light source 7
5:5 Calculation of Color Evaluation Items for Colored Light Sources 7
5:6 Calculation of other color evaluation items 7
6 Test report 8
Appendix A (Normative) CIE1931 Standard Chromaticity Observer Color Matching Function 10
Appendix B (Normative) CIE1964 standard chromaticity observer color matching function 11
Appendix C (Normative) Calculation of Color Tolerance 12
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document replaces GB/T 7922-2008 "Measurement method for color of lighting source": Compared with GB/T 7922-2008, except for structural
In addition to rectification and editorial changes, the main technical changes are as follows:
a) The content of the scope of the standard has been changed (see Chapter 1, Chapter 1 of the:2008 edition);
b) Added terms and definitions such as color gamut and color gamut coverage (see Chapter 3);
c) Changed the test method (see Chapter 4, Chapter 4 of the:2008 edition);
d) The method for measuring and calculating the color consistency of the surface of the lighting source has been added (see 4:6:5 and 5:6:2);
e) Increase the spatial color uniformity of the lighting source (see 5:4:2);
f) The calculation method of color evaluation items for colored light sources has been added (see 5:5);
g) The color consistency calculation method in the dimming process of the lighting source is added (see 5:6:3):
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by the National Color Standardization Technical Committee (SAC/TC120):
This document is drafted by: China Academy of Building Research Co:, Ltd:, Jianke Environmental Energy Technology Co:, Ltd:, Shenzhen Haichuan Industrial Co:, Ltd:
Co:, Ltd:, Changzhou Urban Lighting Management Office, Holsail Lighting Technology Group Co:, Ltd:, Shanghai Xinlong Optoelectronics Technology Co:, Ltd:,
Shenzhen Zhongmeiou Optoelectronics Technology Co:, Ltd:, Dongguan Ruishi Optoelectronics Technology Co:, Ltd:
The main drafters of this document: Wang Shuxiao, Zhang Bin, He Weiping, Ling Wei, Wang Peixing, Liu Fang, Wu Wei, Wang Guohua, Wei Min, Yin Shile, Wang Hua:
This document was first released in 1987, revised for the first time in:2003, revised for the second time in:2008, and this is the third revision:
Method for measuring the color of lighting sources
1 Scope
This document specifies the measurement method for the color of the lighting source, the processing of the measurement results, and the test report:
This document is applicable to the measurement of the color of various lighting sources (hereinafter referred to as "light sources"):
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 5698 Color Terminology
GB/T 7921 Uniform color space and color difference formula
GB/T 9468 General Requirements for Photometric Measurement of Luminaires
GB/T 39394 Test methods for LED lamps, LED lamps and LED modules
JJG213 distribution (color) temperature standard lamp
3 Terms and Definitions
The following terms and definitions defined in GB/T 5698 apply to this document:
3:1
color gamut colorgamut
The range of colors that can be represented by radiation from a light source or system:
3:2
In the CIE1976LUV uniform chromaticity u', v' chromaticity scale diagram, the area of the polygon formed by the chromaticity coordinates of each primary color accounts for the spectral color rail
Percentage of the area within the trace (0:1952):
4 Measurement method
4:1 Classification of measurement methods
Light source color measurement is divided into laboratory measurement and field measurement according to the measurement location: Laboratory measurements verify the performance of the light source: Field measurements
The lighting effect produced by the lighting installation can be tested:
4:2 Light source color evaluation index
4:2:1 According to the type of light source, the following classifications can be made:
a) According to the color of the light source, it can be divided into white light source and colored light source;
b) According to the dimming characteristics of the light source, it can be divided into dimmable light source and non-dimmable light source;
c) According to the number of packaged light sources in the light source, it can be divided into single-channel light source, double-channel light source and multi-channel light source:
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