Retrieved November 12, 2020 - via Instagram. Beyerstein, Lindsay (10 March 2020). "What Happened to Jordan Peterson?". Mechanical watches usually have luminous paint on their fingers and hour marks. However, tritium is expensive - it has to be produced in a nuclear reactor - and it has a 50 percent-lifestyle of only about 12 many years so the paint continues to be luminous for only a few many years.