condition mean min max 4 h after light 2.9 2.9 2.9 8 h after light 4.0 1.6 6.4 12 h after light 3.0999999999999996 1.6 4.6 4 h after dark 4.35 3.6 5.1 8 h after dark 4.4 2.4 6.4 12 h after dark 6.25 6.2 6.3