condition mean min max 4 h after light 6.790295 6.20933 7.37126 8 h after light 6.508274999999999 6.37613 6.64042 12 h after light 6.968680000000001 6.66255 7.27481 4 h after dark 8.99799 8.41897 9.65992 8 h after dark 9.514756666666667 8.88471 10.2243 12 h after dark 6.484683333333333 6.33637 6.65287