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.
For advice on CIE Publications contact helpdesk@cie.co.at. Note the CIE Helpdesk cannot assist with technical enquiries.
von Kries' persistence law
empirical law stating that colour stimuli that match in one set of adaptation conditions continue to do so in any other set
Note 1 to entry: Von 'Kries' persistence law does not apply to all conditions.
Note 2 to entry: This entry was numbered 845-03-18 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-1422 in CIE S 017:2011.