Welcome to the 29th Quadrennial Session of the CIE


Dear Colleagues,

It is our great pleasure to invite you to join us for the activities at the 29th Quadrennial Session of the International Commission on Illumination (CIE), hosted by the United States National Committee of the CIE. The Session, which will be held from June 14 to 22, 2019, in Washington DC, is an important event, which will bring together the international membership of the CIE, as well as other experts and stakeholders in the fields of light and lighting – vision and colour, measurement, lighting applications, photobiology and image technology.  It offers an opportunity to meet colleagues from around the world, to share knowledge both theoretical and practical, and to contribute to the work of CIE Technical Committees.


This Quadrennial Session involves a combination of three distinct aspects of the CIE:

  • A three-day conference for the exchange of technical knowledge and results of new research, through papers, presentations and posters;
  • three days of technical committee meetings, in which experts from each of the CIE Divisions work on the development of CIE International Standards and Technical Reports;
  • and administrative meetings, which mark a turning point, at which the CIE Board of Administration brings on new members, and at which representatives from each CIE member country meet at the General Assembly to set the course of the organization for the next four years. 

There will also be ample social time to connect with colleagues and friends both old and new.


While vitally important for CIE members, this is also a precious opportunity for anyone with an interest in light and lighting, from whatever branch of art or science, from academia or industry, to come together and discuss their interests with like-minded people from around the globe.


We hope that you will join us in Washington DC at the Wardman Park Marriott to celebrate the 29th Quadrennial Session of the CIE.


For further information and detailed arrangements, please visit the Conference Website, either directly at washington2019.cie.co.at, through the CIE homepage at www.cie.co.at, or  the US national committee website at www.cie-usnc.org.






Dr Yoshi Ohno                                            Dr Ronald Gibbons                    Mr James Leland

President, CIE                                            Conference Chair, CIE 2019      President, CIE NC USA