condition mean min max 4 h after light 10.208205 9.78731 10.6291 8 h after light 9.89704 9.61668 10.1774 12 h after light 10.9916 10.6209 11.3623 4 h after dark 13.3177 12.2385 14.3969 8 h after dark 11.8719 11.7861 11.9577 12 h after dark 11.7521 11.3777 12.1265