condition mean min max 4 h after light 18.4 18.4 18.4 8 h after light 16.55 11.6 21.5 12 h after light 7.8 2.1 13.5 4 h after dark 15.8 5.5 26.1 8 h after dark 36.95 26.3 47.6 12 h after dark 38.3 29.5 47.1