condition mean min max 4 h after light 8.8808615 8.356862 9.404861 8 h after light 9.131212999999999 8.857565 9.404861 12 h after light 10.0443535 9.461779 10.626928 4 h after dark 10.1548575 8.573861 11.735854 8 h after dark 10.157778 10.107752 10.207804 12 h after dark 9.341439 9.341439 9.341439