condition mean min max 4 h after light 7.0 7.0 7.0 8 h after light 6.800000000000001 4.3 9.3 12 h after light 11.799999999999999 7.2 16.4 4 h after dark 6.25 5.3 7.2 8 h after dark 4.9 4.0 5.8 12 h after dark 15.799999999999999 10.2 21.4