condition mean min max 4 h after light 9.756134 8.922597 10.589671 8 h after light 10.216586 9.607642 10.82553 12 h after light 10.371048 10.281024 10.461072 4 h after dark 11.0447295 9.910272 12.179187 8 h after dark 10.901939 9.847459 11.956419 12 h after dark 10.539736 10.539736 10.539736