About: http://webisa.webdatacommons.org/228383754

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	In one embodiment, the diode 21 is an LED. By using an LED, if the LED is lit but not the bulb 3, the indication is that the bulb is burned out.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com