condition mean min max 4 h after light 49.582818 46.069633 53.096003 8 h after light 50.5870745 47.864487 53.309662 12 h after light 48.725638000000004 43.320962 54.130314 4 h after dark 47.7207035 43.184311 52.257096 8 h after dark 51.8419775 49.776779 53.907176 12 h after dark 51.109933 51.109933 51.109933