condition mean min max 4 h after light 8.8 8.8 8.8 8 h after light 9.3 4.4 14.2 12 h after light 5.1 4.7 5.5 4 h after dark 10.3 9.2 11.4 8 h after dark 7.9 6.7 9.1 12 h after dark 35.75 11.1 60.4