e-ILV

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.

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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.

17-26-042

photoperiod

natural or artificial cycle of light and darkness to which living organisms can be exposed

Note 1 to entry: This entry was numbered 845-06-27 in IEC 60050-845:1987.

Note 2 to entry: This entry was numbered 17-936 in CIE S 017:2011.

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Publication date: 2020-12
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