About: http://webisa.webdatacommons.org/43169042

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	It takes into account such factors as decreased efficiency with age, accumulation of dust within the fitting itself and the depreciation of reflectance as walls and ceiling age.
http://www.w3.org/ns/prov#wasQuotedFrom	naturalfrequency.com