condition mean min max 4 h after light 7.782805 6.85593 8.70968 8 h after light 7.75648 7.60904 7.90392 12 h after light 8.274115 7.33614 9.21209 4 h after dark 12.155000000000001 11.8838 12.4262 8 h after dark 9.337769999999999 9.01535 9.66019 12 h after dark 9.832605000000001 9.35001 10.3152