condition mean min max 4 h after light 3.6 3.6 3.6 8 h after light 6.35 5.9 6.8 12 h after light 6.7 3.0 10.4 4 h after dark 17.400000000000002 7.2 27.6 8 h after dark 35.75 10.6 60.9 12 h after dark 6.050000000000001 4.2 7.9