condition mean min max 4 h after light 6.3 6.3 6.3 8 h after light 16.35 7.6 25.1 12 h after light 13.200000000000001 8.3 18.1 4 h after dark 6.85 3.7 10.0 8 h after dark 3.3 1.8 4.8 12 h after dark 21.0 6.2 35.8