condition mean min max 4 h after light 9.6 9.6 9.6 8 h after light 17.1 8.4 25.8 12 h after light 32.15 12.9 51.4 4 h after dark 20.6 7.5 33.7 8 h after dark 7.85 4.2 11.5 12 h after dark 12.1 10.1 14.1