SSL Annex

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SSL Annex Releases Final Report of the
2013 Interlaboratory Comparison


This report presents a comparison of 110 laboratories worldwide who tested Light Emitting Diode (LED) lamps and luminaires. The outcome of this large-scale interlaboratory comparison will help governments and manufacturers around the world ensure that new LED products sold to consumers and companies are of high quality and meet the claimed performance.


Click here for more information and to download a copy of the Final Report



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SSL Annex congratulates Professors Isamu Akasaki, Hiroshi Amano and Shuji Nakamura for their joint award of the 2014 Nobel Prize in Physics.  Click here to read the press release.


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The IEA 4E Solid-State Lighting Annex


The SSL Annex was established in 2010 under the framework of the International Energy Agency’s Efficient Electrical End-Use Equipment (4E) Implementing Agreement to provide advice to its ten member countries seeking to implement quality assurance programs for SSL lighting. This international collaboration brings together the governments of Australia, China, Denmark, France, Japan, The Netherlands, Republic of Korea, Sweden, United Kingdom and United States of America. China works as an expert member of the 4E SSL Annex.

The IEA 4E SSL Annex is undertaking three major collaborative tasks, comprising:

Task 1) Develop performance criteria for quality assurance in SSL products. For more information, click here.

Task 2) Determine the robustness of SSL test procedures through international round-robin laboratory testing campaigns and, where necessary, suggest improvements to test methodologies. For more information, click here. 

Task 3) Recommend suitable accreditation frameworks for SSL testing laboratories. For more information, click here.

The Annex operates with the assistance of twenty technical SSL experts from ten countries around the world.


Quality and Performance Tiers

Nucleus Laboratory Comparison

2013 Interlaboratory Comparison


Upcoming Meetings

15-17 October 2014

9th SSL Annex Expert Meeting

Portland, Oregon, USA


25–27 May 2015

10th SSL Annex Expert Meeting

Sydney, Australia

(prior to SPARC 2015)


SSL Annex Participating Countries


China (Expert Member)



The Netherlands

Republic of Korea


United Kingdom

United States of America



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