condition mean min max 4 h after light 6.0 6.0 6.0 8 h after light 17.9 12.3 23.5 12 h after light 18.95 15.6 22.3 4 h after dark 35.05 30.5 39.6 8 h after dark 31.950000000000003 27.2 36.7 12 h after dark 39.95 33.1 46.8