condition mean min max 4 h after light 17.4 17.4 17.4 8 h after light 4.3 3.8 4.8 12 h after light 8.6 7.7 9.5 4 h after dark 29.75 19.5 40.0 8 h after dark 36.1 13.6 58.6 12 h after dark 31.5 18.7 44.3