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.
maintained lighting value
value used in lighting calculations that consider (a) the lamp luminous flux depreciation at the planned time of replacement, (b) the luminaire dirt depreciation, and (c) the room surface dirt depreciation (in interiors) or the surface dirt depreciation for other relevant surfaces (in exteriors, where appropriate)
Note 1 to entry: This entry was numbered 17-752 in CIE S 017:2011.