The International Commission on Illumination (CIE, from Commission Internationale de l’Eclairage) is an international technical and scientific organization for all matters relating to the science, technology and art in the fields of light and lighting, color and vision, photometry and radiometry, photobiology, and image technology.

The CIE is an international standards development organization for topics across its scope, and is recognized as such by the International Standards Organization (ISO), the International Electrotechnical Commission (IEC) and the International Committee for Weights and Measures (CIPM).

CIE is devoted to international cooperation, based on monetary support from National Committees of participating countries, in exchange for participation in CIE committees and discount on CIE publications.

The United States National Committee (CIE-USNC) is a non-profit organization, run by volunteers, and supported by individual and organizational memberships.

CIE-USNC Membership Application – Online Form

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