condition mean min max 0 h after light 3.601855 3.43857 3.76514 4 h after light 4.22225 3.91104 4.53346 8 h after light 3.684435 3.21535 4.15352 4 h after dark 4.73291 4.35883 5.10699 8 h after dark 3.97613 3.50469 4.44757 12 h after dark 3.16132 2.96855 3.35409