condition mean min max 4 h after light 15.0336645 14.245527 15.821802 8 h after light 12.9516485 11.821181 14.082116 12 h after light 15.21567 13.974902 16.456438 4 h after dark 11.169422999999998 10.223104 12.115742 8 h after dark 12.541422 11.252257 13.830587 12 h after dark 17.186896 17.186896 17.186896