An expandable and shrinkable decorative lighting string arrangement with a plurality of lamp bulbs, lamp bases, lamp holders, all connected by wires to form a lighting string. The lighting string is connected to a plurality of stands by a clamp. An axis connector forms a support for the ends of the stands, and the ends of the stands are movably connected to the axis connector to form an expandable volume and a shrunken volume. The expandable volume attains a decorative structure with the stands spaced from each other. The shrunken volume positions the stands adjacent to each other. A locking device locks the stands to the axis connector to cause the stands to form the decorative structure.