condition mean min max 4 h after light 11.51572 10.91648 12.11496 8 h after light 12.4776995 12.365504 12.589895 12 h after light 10.868934 10.821388 10.91648 4 h after dark 10.91648 10.91648 10.91648 8 h after dark 9.647174 8.985936 10.308412 12 h after dark 9.837505 9.837505 9.837505