condition mean min max 4 h after light 10.6559855 10.284995 11.026976 8 h after light 9.1917035 9.113157 9.27025 12 h after light 11.806972 11.805043 11.808901 4 h after dark 10.4867535 9.972898 11.000609 8 h after dark 12.9651015 12.629164 13.301039 12 h after dark 10.382173 10.382173 10.382173