condition mean min max 4 h after light 10.5971165 9.663481 11.530752 8 h after light 8.2377935 8.157719 8.317868 12 h after light 12.8967775 9.270333 16.523222 4 h after dark 10.288055 9.716033 10.860077 8 h after dark 13.676469 9.72197 17.630968 12 h after dark 15.341971 15.341971 15.341971