condition mean min max 4 h after light 4.5 4.5 4.5 8 h after light 19.55 7.9 31.2 12 h after light 8.3 7.8 8.8 4 h after dark 6.05 6.0 6.1 8 h after dark 11.5 5.8 17.2 12 h after dark 34.449999999999996 8.6 60.3