About: http://webisa.webdatacommons.org/418486518

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	building one from scratch is a pain in the ass, mainly because you need to build something that holds the sensor, lens, and LED together perfectly.
http://www.w3.org/ns/prov#wasQuotedFrom	reddit.com