condition mean min max 4 h after light 2.1 2.1 2.1 8 h after light 3.3499999999999996 2.9 3.8 12 h after light 5.7 3.6 7.8 4 h after dark 4.9 4.1 5.7 8 h after dark 4.449999999999999 2.3 6.6 12 h after dark 6.95 5.4 8.5