About: http://webisa.webdatacommons.org/281053258

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	Therefore, if LEDs or other inexpensive light sources are used, the light is preferably focused on the light sensor or light sensors.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca