GITD works ok on wristwatches when you're completely dark adapted, since it's persistent enough that you can read the time all night by holding the watch up to your eye. For all those other uses you mentioned, you're better off with battery powered lights or tritium markers. For example, Eveready makes a nice under-$10 household flashlight that has a blinking locator LED that will run for 5+ years on the flashlight's two D cells.