condition mean min max 0 h after light 8.685955 8.68031 8.6916 4 h after light 7.553825 7.30287 7.80478 8 h after light 10.655635 9.85477 11.4565 4 h after dark 11.1053 10.8377 11.3729 8 h after dark 9.216065 8.84477 9.58736 12 h after dark 7.167595 6.83711 7.49808