condition mean min max 4 h after light 52.7 52.7 52.7 8 h after light 24.2 22.7 25.7 12 h after light 20.9 18.7 23.1 4 h after dark 24.2 5.6 42.8 8 h after dark 13.55 4.0 23.1 12 h after dark 42.2 28.6 55.8