condition mean min max 4 h after light 0.9 0.9 0.9 8 h after light 3.25 2.6 3.9 12 h after light 2.75 2.3 3.2 4 h after dark 3.0999999999999996 2.8 3.4 8 h after dark 1.4 1.2 1.6 12 h after dark 2.25 1.3 3.2