IEA 4E SSL Annex issues new report promoting CIE’s new global test standard

January 21, 2022

The International Energy Agency’s Energy Efficient End-use Equipment (IEA 4E) Solid State Lighting Annex (SSL Annex) organized the 2017 Interlaboratory Comparison (IC 2017) to investigate the level of agreement in measurements of SSL products by various types of goniophotometers including near-field type and source-rotating type, as well as mirror-type goniophotometers which are most commonly used.

The CIE International Standard CIE S 025:2015 Test Method for LED Lamps, LED Luminaires and LED Modules was used as the basis of this comparison (

More information about this comparison can be found on the comparison webpage:

And coming up soon is a webinar to present the findings, this will be presented by Dr. Yoshi Ohno, Task Leader of IC 2017 (and the past-President of the CIE.
The webinar will be given twice:

Australian/Asian time zone Jan 25, 2022 at 13h00 Australian Eastern Daylight Time (AEDT, UTC + 11 hours);
European/North American time zone Jan 25, 2022 at 15h00 Central European Time (CET, UTC +1 hour).