condition mean min max 4 h after light 1.4 1.4 1.4 8 h after light 2.0 0.8 3.2 12 h after light 17.3 0.6 34.0 4 h after dark 2.55 1.4 3.7 8 h after dark 1.3 0.9 1.7 12 h after dark 1.7999999999999998 1.3 2.3