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 Note the CIE Helpdesk cannot assist with technical enquiries.




non-SI unit for conventional retinal illuminance and natural pupil luminance

Note 1 to entry: When the eye is viewing a surface of uniform luminance, the numerical value of the conventional retinal illuminance or the natural pupil luminance, expressed in troland, is equal to the product of the area in square millimetres of the limiting pupil, natural or artificial, by the luminance of the surface in candela per square metre.

Note 2 to entry: This entry was numbered 845-02-16 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-1349 in CIE S 017:2011.

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