condition mean min max 4 h after light 20.0 20.0 20.0 8 h after light 17.1 9.9 24.3 12 h after light 10.4 3.3 17.5 4 h after dark 16.35 16.3 16.4 8 h after dark 16.2 2.7 29.7 12 h after dark 21.2 18.7 23.7