condition mean min max 4 h after light 5.1 5.1 5.1 8 h after light 9.55 1.8 17.3 12 h after light 2.8499999999999996 2.4 3.3 4 h after dark 9.65 4.0 15.3 8 h after dark 3.35 2.2 4.5 12 h after dark 4.65 4.2 5.1