condition mean min max 0 h after light 49.52275 47.1067 51.9388 4 h after light 18.46435 18.0366 18.8921 8 h after light 15.57865 15.4763 15.681 4 h after dark 26.6542 25.6101 27.6983 8 h after dark 28.99275 27.4713 30.5142 12 h after dark 42.14535 33.7845 50.5062