ratio of the average illuminance on the working plane after a certain period of use of a lighting installation to the average illuminance obtained under the same conditions for the installation considered conventionally as new NOTE 1 - The term depreciation factor has been formerly used to designate the reciprocal of the above ratio. NOTE 2 - The l...
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-09-59
(LLF) A factor used in calculating luminance after a given period of time and under given conditions. It takes into account temperature and voltage variations, dirt accumulation on luminaire and lit surfaces, lamp depreciation, maintenance procedures and atmos
Found on
http://www.youngco.com/young2.asp?ID=4&Type=3
No exact match found.
