The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.

To search for another term please use  "Back to the list" to return to the main page or the e-ILV.

For the complete set of terms and definitions CIE S 017:2020 can be purchased from the CIE Webshop. Members of a CIE National Committee or Associate National Committee have access to a 66,7 % discount on the purchase price of the standard.


iso-intensity curve

iso-intensity line

DEPRECATED: isocandela curve

DEPRECATED: isocandela line

curve traced on a sphere that has its centre at the light centre of the light source, joining all the points corresponding to those directions in which the luminous intensity is the same, or a plane projection of that curve

Note 1 to entry: The terms "isocandela curve" and "isocandela line" are no longer in use.

Note 2 to entry: This entry was numbered 845-09-28 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-618, 17-620, 17-613, and 17-615 in CIE S 017:2011.

Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.