condition mean min max 4 h after light 4.9 4.9 4.9 8 h after light 13.25 6.5 20.0 12 h after light 11.549999999999999 4.7 18.4 4 h after dark 1.9500000000000002 1.7 2.2 8 h after dark 9.0 8.3 9.7 12 h after dark 13.7 8.7 18.7