<http://webisa.webdatacommons.org/311171736>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/485464281>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/311171736> .
<http://webisa.webdatacommons.org/311171736>	<http://www.w3.org/ns/prov#value>	"The present invention controls the level of light at a workplane within a building, the level of light being supplied from sources of light including sunlight and at least one artificial light source, by compensating for variations in sunlight" .
<http://webisa.webdatacommons.org/311171736>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .