Lighting structure used for decorating

A decorative lighting structure comprising:

• a plurality of lighting tubes, each tube comprising a first fastening end and a second fastening end, said lighting tubes being provided in an interior with one or more light bulbs;
• a plurality of convex joints, each convex joint comprising a first tubular member and a second tubular member, said first tubular member being comprised of a fastening end and a first pivoting end, said second tubular member being comprised of a fastening end and a second pivoting end whereby each of said convex joints is used to fasten pivotally two of said lighting tubes in such a manner that said fastening end of said first tubular member is fastened to said first fastening end of one of the two lighting tubes, and that said fastening end of said second tubular member is fastened to said first fastening end of another one of the two lighting tubes, and that said first pivoting end of said first tubular member and said second pivoting end of said second tubular member are pivoted together by a pivot;
• and
• a plurality of concave joints, each concave joint comprising a first tubular member and a second tubular member, said first tubular member being comprised of a fastening end and a first pivoting end, said second tubular member being comprised of a fastening end and a second pivoting end whereby each of said concave joints is used to fasten pivotally the two lighting tubes such that said fastening end of said first tubular member is fastened to said second fastening end of the one of the two lighting tubes, and that said fastening end of said second tubular member is fastened to said second fastening end of the other one of the two lighting tubes, and that said first pivoting end of said first tubular member and said second pivoting end of said second tubular member are pivoted together by a pivot.