In Sri-speak, a "beacon" is an observable artifact the draws certain people (like the tribe)toward it. This is an alternative to searching for those people. If the beacon is compelling enough, people will act by going to the source of the signal, which is me!
Beacons can be anything that catches the attention of an individual because of its rarity in day-to-day interactions. It could be the way someone writes or designs things, which is the primary form of my beacons. Beacons can be turns of phrase that capture the zeitgeist of an experience.