About: http://webisa.webdatacommons.org/55873340

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	Such a lighting system usually has a metal housing containing high voltage electrical hardware such as a transformer, a starter, etc., and includes a large, thick glass lens, all of which add to its significant collective weight.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com