LED light string with single wire and illumination device

An illumination device, comprising:

• an LED string light with a single wire comprising:
• one wire comprising a composite wire core;
• the composite wire core being composed of at least one first conductor layer extending in an axial direction of the wire, at least one second conductor layer extending in the axial direction of the wire, and an insulation layer therebetween;
• and
• a plurality of light bodies arranged spaced away at set intervals along the axial direction of the wire;
• each of the light bodies comprising at least one patch LED light-emitting part and an encapsulation colloid coated on a surface of the at least one patch LED light-emitting part;
• a positive electrode and a negative electrode of the at least one patch LED light-emitting part being electrically connected to the at least one first conductor layer and the at least one second conductor layer, respectively;
• a control box comprising:
• a connection circuit board provided with at least one first connection line, at least one second connection line, and a through hole;
• an inner wall of the through hole is provided with at least one first conductive portion conducting to the at least one first connection line and at least one second conductive portion conducting to the at least one second connection line;
• one end of the wire of the LED string light is inserted into the through hole, and the at least one first conductor layer and the at least one second conductor layer of the wire are welded to the at least one first conductive portion and the at least one second conductive portion, respectively;
• wherein a positive electrode output and a negative electrode output of the control box are electrically connected to the at least one first conductor layer and the at least one second conductor layer of the LED string light, respectively.