IHS is your source for CIE standards and publications.
The International Commission on Illumination - also known as the CIE
from its French title, the Commission Internationale de l´Eclairage - is
devoted to worldwide cooperation and the exchange of information on all
matters relating to the science and art of light and lighting, colour and
vision, photobiology and image technology.
With strong technical, scientific and cultural foundations, the CIE is
an independent, non-profit organization that serves member countries on a
voluntary basis. Since its inception in 1913, the CIE has become a
professional organization and has been accepted as representing the best
authority on the subject and as such is recognized by ISO as an
international standardization body.