condition mean min max 4 h after light 1.977315 1.96963 1.985 8 h after light 1.5283799999999998 1.3067 1.75006 12 h after light 0.7566035 0.162837 1.35037 4 h after dark 3.023765 2.72126 3.32627 8 h after dark 2.97101 2.95738 2.98464 12 h after dark 1.99471 1.87194 2.11748