About: http://webisa.webdatacommons.org/98283622

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	The light emitted from the lamp 10 onto a surface positioned about six inches away illuminates an area about 24 inches long and 11 inches wide, including a region of highly concentrated light in the center.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com