condition mean min max 4 h after light 2.106805 1.69788 2.51573 8 h after light 1.4788199999999998 1.04642 1.91122 12 h after light 3.7352999999999996 3.13569 4.33491 4 h after dark 5.879823333333333 3.09771 7.37697 8 h after dark 4.301053333333333 2.33389 6.63629 12 h after dark 6.18659 4.37889 7.57838