1. The New CIE Standard Test Method for LED Lamps, LED Luminaires and LED Modules: CIE S 025/E:2015
Tony Bergen
Technical Director, Photometric Solutions International
Secretary, CIE Division 2
Australian National Representative, CIE Division 2

2. Contents Introduction to the CIE Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion

3. Introduction The CIE is the International Commission on Illumination
Abbreviated to CIE from its French form: Commission Internationale de l'Eclairage
The global peak body on matters relating to the science and art of lighting
Responsible for creating and maintaining standards and technical reports within the fields such as:
vision and colour;
photometry and radiometry;
lighting and signalling; and
photobiology

4. Introduction Has seven scientific divisions:
Division 1: Vision and Colour;
Division 2: Measurement of Light and Radiation;
Division 3: Interior Environment and Lighting Design;
Division 4: Lighting and Signalling for Transport;
Division 5: Exterior Lighting and Other Applications;
Division 6: Photobiology and Photochemistry;
Division 8: Image Technology
Each of these divisions has Technical Committees which carry out the scientific work
CIE also has national committees with voting rights at a general assembly and which support the CIE’s interests within their jurisdiction

5. Introduction
CIE experts are on the BIPM’s Consultative Committee on Photometry and Radiometry and provide advice in relation to the SI unit for light:
the Candela.
CIE has agreements with ISO and IEC: these agreements recognise the CIE as an official standardising body for light and lighting matters.

6. Introduction
Foundation work for CIE’s formation started in 1901, but…..
CIE’s Statutes have operative date of September 1913, which means that…..
CIE turned 100 two years ago!
x100!

7. Contents Introduction to the CIE Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion

8. Need for a Standard
Currently (previously) there are many different test methods used in different areas around the world:
IESNA LM-79-08
EN test methods
IEC 62722, IEC 62612, IEC 62717
JIS C 7801 Am.1: 2012, JIS C
Chinese CQC and GB standards
etc.

9. From a presentation by Yoshi Ohno for the IEA 4E SSL Annex
Need for a Standard
From a presentation by Yoshi
Ohno for the IEA 4E SSL Annex

10. Need for a Standard
AIM
A unified global standard for harmonisation of testing of LEDs and SSL products

11. From a presentation by Yoshi Ohno for the IEA 4E SSL Annex
Need for a Standard
From a presentation by Yoshi
Ohno for the IEA 4E SSL Annex

12. Contents Introduction to the CIE Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion

13. Development of the Standard
A CIE Division 2 Technical Committee worked on the standard:
TC2-71: CIE Standard on Test Methods for LED Lamps, luminaires and modules
The TC has 37 members from 16 countries in 5 continents
Working closely with CEN-TC169-WG7
Draft published in September 2014
Final version published in March 2015

14. Development of the Standard
Has had significant difficulties establishing a consensus amongst the stakeholders:
Public testing labs;
LED/Lighting manufacturers;
Test equipment manufacturers;
Regulatory bodies;
NMIs;
etc…

15. Development of the Standard
Also needed a consensus with the CEN-TC169-WG7 working group, whom we were partnering in the development
(It is technically identical to the CEN standard EN , which will be released soon)

16. Development of the Standard
There have been some robust discussions and disagreements
Difficulties were largely overcome so that we could move forward to begin the publication phase

17. Contents Introduction to the CIE Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion

18. Features of the Standard
The draft Standard defines standard test conditions and requirements for equipment
It covers electric, photometric and spectral/colorimetric properties
It covers LED lamps, LED luminaires and LED modules
Testing should ideally be performed according to the standard test conditions

19. Features of the Standard
Some of the standard test conditions have tolerances to take into account practical laboratory situations
Example 1:
The ambient test temperature should be 25°C
In practice it can be in the range 25 ± 1.2 °C (including uncertainty in measurement of temperature)
Example 2:
The air should be still
In practice it is allowed to be up to 0.25 m/s (including uncertainty in measurement of air speed)

20. Features of the Standard
If the standard test conditions are not met, then a correction must be made
For example:
A goniophotometric test is made with ambient temperature of 23 ± 0.5 °C
This is outside the range 25 ± 1.2 °C
An additional test must be made, eg: with the device in a temperature controlled chamber, to correct the measured value to what it would be if the test were performed at 25°C

21. Features of the Standard
The equipment and electrical supply also have tolerances
Examples:
The test voltage shall be measured at the supply terminals of the DUT, not at the output terminals of the power supply
Tolerance interval: ± 0.4 % for RMS AC voltage; 0.2 % for DC voltage.
The total harmonic content of the voltage waveform shall not exceed 1.5 % of the fundamental (except if PF > 0.9, then it shall be less than 3 %).

22. Features of the Standard
The standard covers measurement using:
Integrating spheres;
Goniophotometers;
Near-field gonio allowed if validated against a far field gonio
The DUT can be tested in an orientation other than its designed burning position, provided corrections are made
Luminance meters, including ILMDs;
Spectroradiometers.

23. Features of the Standard
Measurements must be traceable
Equipment must be properly calibrated
Traceability chain must be maintained back to a national laboratory (National Measurement Institute)
All test reports must contain a statement of uncertainty of measurement
The standard gives a guide for how to make an uncertainty budget
The Standard really just focuses on quality and compatibility of measurement, and not product performance as such.

24. What it covers The draft Standard covers:
Environmental conditions (air temperature, air movement, stray light);
Electrical supply and quality;
Measurement instruments (photometric & electrical);
Lamp mounting / operating position;
Lamp Operating Conditions;
Lamp stabilisation;
Initial total luminous flux;
Centre beam and beam angles;
Partial luminous flux (useful lumens);
Test distance for far-field goniophotometry;
Colour and chromaticity measurements.

25. What it doesn’t cover
The draft Standard does not cover or partially covers:
Dimmable, internal feedback, adjustable colour, adjustable white, multicolour;
Maintained luminous flux;
Omni-directional assessment;
Maintained colour measurements;
Harmonics & EMC;
Start time / activation time;
Switch withstand;
Lamp Life;
Temperature cycling shock;
Endurance;
Photobiological hazards;
Flicker;
Dimmer compatibility.
Note: Many of these are already covered satisfactorily in other Standards.

26. Contents Introduction to the CIE Need for an International Standard
Development of the Standard
Features of the Standard
Conclusion

27. Conclusions
The CIE is the world’s premier scientific organisation responsible for matters relating to light and lighting
Celebrated its official centenary in 2013
CIE has developed an International Standard Test Method for LED Lamps, LED Luminaires and LED Modules
This will enable accurate and repeatable measurements for harmonisation and intercomparison around the globe

28. Thank you for your kind attention
Tony Bergen
Technical Director
Photometric Solutions International
Factory Two, Railway Avenue
Huntingdale, Vic, 3166, Australia
Tel:
Fax:
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