condition mean min max 4 h after light 16.419817 15.922156 16.917478 8 h after light 18.968661 18.010359 19.926963 12 h after light 15.201903 13.486328 16.917478 4 h after dark 15.732115499999999 14.546753 16.917478 8 h after dark 16.6846155 15.595899 17.773332 12 h after dark 18.127237 18.127237 18.127237