condition mean min max 4 h after light 2.6 2.6 2.6 8 h after light 13.95 6.1 21.8 12 h after light 3.2 2.0 4.4 4 h after dark 21.85 12.0 31.7 8 h after dark 2.4 2.4 2.4 12 h after dark 5.050000000000001 3.2 6.9