Three-wire flat cable high-voltage plug-in light string and method of making thereof

A method of making a light string comprising:

• providing a three-wire flat cable comprising a middle wire between two outer wires;
• cutting the middle wire at a first place to expose copper strands of the middle wire;
• mounting a plurality of light sources on a circuit board, the circuit board comprising a first and a second exposed conductor contact patches located at a first end of the circuit board;
• applying phosphor materials over the mounted light sources to create a luminous pattern;
• enclosing the circuit board in a protective shell;
• coupling the enclosed circuit board with connecting parts;
• inserting two metallic contact tips into corresponding bayonets in the connecting parts such that each of the two metallic contact tips are in electrical contact with one of the first and second exposed conductor contact patches;
• affixing the three-wire flat cable onto a light holder;
• clamping a top cap over the three-wire flat wire onto the light holder, forming an enclosure through which the three-wire flat wire passes;
• installing a first and a second metal nails into designated insertion points on the light holder such that the first and second metal nails penetrate through the light holder, reaching the middle wire of the three-wire cable and establishing electrical contact with the exposed copper strands of the middle wire;
• and
• aligning and pushing the first and second metal nails through the light holder to be in contact with the first and second metallic contact tips, respectively.