condition mean min max 4 h after light 4.1 4.1 4.1 8 h after light 1.65 1.4 1.9 12 h after light 3.25 2.2 4.3 4 h after dark 3.2 3.1 3.3 8 h after dark 9.549999999999999 1.7 17.4 12 h after dark 2.4 2.0 2.8