condition mean min max 4 h after light 1.7 1.7 1.7 8 h after light 1.35 0.9 1.8 12 h after light 12.600000000000001 1.6 23.6 4 h after dark 21.5 3.3 39.7 8 h after dark 2.2 1.5 2.9 12 h after dark 2.8499999999999996 2.8 2.9