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.
washout
reduction of contrast caused by the non-specular or specular reflection of light from the sign face when light falls on a sign from a source or sources external to the sign
Note 1 to entry: Washout can cause the contrast ratio of the sign to fall below its permitted limit.
Note 2 to entry: This entry was numbered 17-1423 in CIE S 017:2011.