condition mean min max 4 h after light 3.2 3.2 3.2 8 h after light 24.25 2.1 46.4 12 h after light 6.45 4.1 8.8 4 h after dark 18.15 13.0 23.3 8 h after dark 47.65 33.5 61.8 12 h after dark 34.85 22.0 47.7