condition mean min max 4 h after light 3.8258199999999998 3.76556 3.8801699999999997 8 h after light 3.81952 3.79227 3.84772 12 h after light 3.82674 3.79976 3.86924 4 h after dark 3.82897 3.7881400000000003 3.90896 8 h after dark 3.71334 3.63936 3.7825900000000003 12 h after dark 3.863226666666667 3.7600800000000003 4.06016