condition mean min max 4 h after light 17.3 17.3 17.3 8 h after light 7.45 6.4 8.5 12 h after light 13.45 4.1 22.8 4 h after dark 3.4 2.7 4.1 8 h after dark 2.8499999999999996 2.4 3.3 12 h after dark 11.9 8.9 14.9