Boston’s official tree-lighting concert “Holiday Lights,” will be broadcasted live from 7-8 p.m., Thursday, Dec. 5 on WCVB-TV Channel 5. Chronicle co-anchors J.C. Monahan and Anthony Everett will host the yuletide celebration. Boston Common and the Public Garden will light up in sequence when Mayor Menino throws the switch on Boston’s 48-foot white spruce holiday tree.