Retrieved November 12, 2020 - by using Instagram. Beyerstein, Lindsay (10 March 2020). "What Happened to Jordan Peterson?". Mechanical watches generally have luminous paint on their palms and hour marks. However, tritium is expensive - it has to be made in a nuclear reactor - and it has a half-existence of only about twelve a long time so the paint continues to be luminous for only a handful of many years.