condition mean min max 4 h after light 8.912327000000001 8.135146 9.689508 8 h after light 8.258308 7.324184 9.192432 12 h after light 9.272997499999999 8.649607 9.896388 4 h after dark 9.005859000000001 8.387326 9.624392 8 h after dark 8.27989 8.27989 8.27989 12 h after dark 8.27989 8.27989 8.27989