condition mean min max 4 h after light 3.6 3.6 3.6 8 h after light 2.5999999999999996 2.4 2.8 12 h after light 1.75 1.1 2.4 4 h after dark 2.6 2.1 3.1 8 h after dark 9.8 1.1 18.5 12 h after dark 1.7999999999999998 1.2 2.4