condition mean min max 4 h after light 61.1846 49.2898 73.0794 8 h after light 55.88605 51.3829 60.3892 12 h after light 66.72295 59.3143 74.1316 4 h after dark 76.99266666666666 74.1466 80.0086 8 h after dark 70.3988 66.4273 75.8321 12 h after dark 55.86443333333333 55.6155 56.05