Dual-color light strings

A light string, comprising:

• a first insulated electrical wire including a first conductive core and a first insulating layer;
• wherein the first insulating layer covers the first conductive core and the first conductive core is partially exposed to form a first soldering section;
• a second insulated electrical wire including a second conductive core and a second insulating layer;
• wherein the second insulating layer covers the second conductive core, the second conductive core is partially exposed to form a second soldering section, and the first conductive core and the second conductive core are electrically isolated from each other;
• an LED device electrically connected to the first soldering section and the second soldering section;
• wherein the LED device is a side-emitting LED device having a light emitting direction in parallel to the first insulated electrical wire and the second insulated electrical wire;
• and
• transparent glue covering the LED device, the first soldering section and the second soldering section and extending to partially cover the first insulating layer and the second insulating layer.