cie

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.

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.

17-26-044

melatonin

melatonin hormone

hormone secreted from the pineal gland

Note 1 to entry: Levels of melatonin in the pineal gland, blood, saliva, and urine fluctuate in a circadian rhythm, higher at night and lower in the daytime, following the biological clock that is itself set naturally by day/night photoperiods. Light at night reduces melatonin, while decoupling the biological and natural (or artificially induced) photoperiods causes disruption of sleep/wake cycles (e.g. jet lag).

Note 2 to entry: This entry was numbered 17-762 in CIE S 017:2011.

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