condition mean min max 4 h after light 5.47244 5.26802 5.67686 8 h after light 15.14255 14.3844 15.9007 12 h after light 10.063385 9.29097 10.8358 4 h after dark 16.0597 12.4249 19.6945 8 h after dark 10.96735 10.692 11.2427 12 h after dark 7.21697 6.17181 8.26213