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.

17-21-114

averaged LED intensity

illuminance averaged over a circular aperture of 100 mm² area normal to the LED's mechanical axis at a distance of 100 mm for CIE Standard Condition A or 316 mm for CIE Standard Condition B from the tip of the LED, multiplied by the square of the distance and divided by a unit solid angle

Note 1 to entry: A detailed method of measurement is given in CIE 127 Measurement of LEDs.

Note 2 to entry: The geometric conditions CIE Standard Condition A and CIE Standard Condition B, which correspond to symbols ILED,A and ILED,B respectively, are defined in CIE127 Measurement of LEDs.

Note 3 to entry: The averaged LED intensity is expressed in candela (cd).

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