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

1 . 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 a first end and a second end of the middle wire;

connecting a light source to the exposed first end and second end of the middle wire;

inserting a tail cover of a lamp holder to protect the exposed first end and second end of the middle wire;

wrapping the light source in a heat shrink tube to waterproof the light source;

securing a lamp head on the tail section of the lamp holder; and

attaching a decorative shell to the lamp head,

wherein the tail cover comprises two parallel pieces that each is inserted between the middle wire and one of the outer wires.

2 . The method of claim 1 , wherein the light source comprises a light emitting diode (LED).

3 . The method of claim 1 , wherein the light source comprises a filament strip LED.

4 . The method of claim 1 , wherein the light source comprises a first leg and a second leg; and

Wherein the first leg and the second leg are riveted to the exposed first end and second end of the middle wire, respectively.

5 . The method of claim 1 , wherein the light source comprises a two-wire SMD LED light string.

6 . The method of claim 1 , wherein the parallel pieces of the tail cover extend to cover at least part of the light source.

7 . The method of claim 1 , further comprising inserting a waterproof accessory inside the lamp head between a flat surface of the three-wire flat cable and the tail piece of the lamp head.