TACLOBAN, Philippines — Christmas lights blink in a handful of restaurants in Tacloban, but at nightfall, much of this city flattened by Typhoon Haiyan slips into darkness. A few downtown shops have reopened. Roadside vendors peddle fruits of the season: oranges and red apples. There is rebuilding, though much of it consists of residents hammering shelters out of scavenged debris. The Nov. 8 typhoon killed more than 6,100 people in the eastern Philippines, displaced at least 4 million others and left its most gruesome mark on Tacloban, a city of 240,000 that will need years to recover. Soon after the storm, Philippine Energy Secretary Jericho Petilla promised to restore power by Christmas…