condition mean min max 4 h after light 3.8 3.8 3.8 8 h after light 3.5 1.7 5.3 12 h after light 1.7999999999999998 1.2 2.4 4 h after dark 1.05 1.0 1.1 8 h after dark 10.2 0.9 19.5 12 h after dark 7.2 5.1 9.3