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.

17-29-051

optical light output ratio, <of a luminaire>

quotient of the total luminous flux of the luminaire, measured under specified conditions, and the sum of the individual luminous fluxes of the lamps when they are inside the luminaire

Note 1 to entry: For luminaires using incandescent lamps only, the optical light output ratio and the light output ratio are the same in practice.

Note 2 to entry: The optical light output ratio has unit one.

Note 3 to entry: This entry was numbered 845-09-38 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-847 in CIE S 017:2011.

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