GB/T 38539-2020Technical requirements for the application of LED sports lighting (English PDF)

1 Scope

China's national technical requirements for LED sports lighting. It specifies the terms and definitions, the general requirements and the classification of specifications. Sports lighting is the most demanding of all outdoor lighting applications, and the reason is television. A pitch lit adequately for players is nowhere near adequate for a broadcast camera, which needs several times the illuminance, needs it uniform across the field and vertically as well as horizontally so that faces are lit, and needs it free of flicker - which is where LED sports lighting differs sharply from the metal halide it replaced. A metal halide lamp has thermal inertia that smooths the mains cycle; an LED driver does not, and a super slow motion camera at a thousand frames a second will show banding or pulsing that is invisible to the eye. The requirements on driver flicker are therefore as important as those on illuminance and glare.

This Standard specifies terms and definitions, general requirements, specification classification requirements and performance requirements for luminaires, driving power supplies and lighting control systems of LED for stadium sports lighting. This Standard is applicable to LED luminaires, driver and lighting control system as well as their applications for stadium and auditorium lighting.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB 7000.1, Luminaires - Part 1: General requirements and tests

GB 7000.7, Safety requirements for floodlights

GB 7000.218, Luminaires - Part 2-18: Particular requirements - Luminaries for swimming pools and similar application

GB/T 7921-2008, Uniform color space and color difference formula

GB/T 9254, Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement

GB 17625.1-2012, Electromagnetic compatibility - Limits - Limits for harmonic current emissions (equipment input current <=16 A per phase)

GB/T 17626.5-2019, Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test

GB/T 17743, Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment

GB/T 18595, Equipment for general lighting purposes - EMC immunity a visual phenomenon that causes uncomfortable feeling or reduces the ability to observe details or objects due to the inappropriate brightness distribution or brightness range in the field of view, or the existence of extreme contrast\ [JGJ/T 119-2008, definition 2.2.17]

3.6 colour rendering index measurement of light source color rendering, expressed by the degree of agreement between the color of the object under the measured light source and the color of the object under the reference light source [JGJ/T 119-2008, definition 2.3.28]

3.6.1 general colour rendering index; Ra the average value of the color rendering index of the light source to the 1st ~ 8th standard color samples specified by the International Commission on Illumination (CIE)

3.6.2 special colour rendering index; Ri the color rendering index of the light source for the 9th ~ 15th standard color samples selected by the International Commission of Illumination (CIE) NOTE: In this Standard, R9 refers to the color rendering index of the light source for the 9th standard color sample selected by the International Commission on Illumination (CIE).

3.7 colour temperature when the chromaticity of the light source is the same as the chromaticity of a black body at a certain temperature, the absolute temperature of the black body is the color temperature of the light source; color temperature is used to express how warm (red) or cold (blue) a kind of lighting feels or the apparent feeling [JGJ/T 119-2008, definition 2.3.21]

7 Driver performance requirements...