condition mean min max 4 h after light 9.063815 8.88152 9.24611 8 h after light 9.96106 9.51822 10.4039 12 h after light 13.5579 13.5228 13.593 4 h after dark 13.10435 12.7889 13.4198 8 h after dark 11.2529 10.9483 11.5575 12 h after dark 11.0293 10.9937 11.0649