BS PD ISO/CIE TS 22012:2019 specifies a standardized way of working for determining the maintenance factor for both outdoor and indoor lighting installations using the methodology as described in CIE 154:2003 and CIE 097:2005.Cross References:IEC 62722-2-1CIE 097:2005CIE 154:2003CIE S 017IEC 62717:2014/AMD1:2015CIE 088:2004IES TM-21-11IEC 62722-1
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