A self-coiling light structure is designed to expand and retract in a controlled manner to prevent tangling and facilitate compact storage. The structure comprises a flexible coil made of wire, rope, plastic, or a combination thereof, incorporating a power-conducting element and LED lights positioned at intervals. The coil is configured to retain a predetermined shape through an internal memory material, allowing it to automatically retract into a compact form when not in use. The structure further includes securement features such as loops or clips for attachment to external structures, as well as male and female power connectors for interconnection with additional sections. Various embodiments provide for different configurations of the coil in excited and unexcited states, ensuring ease of deployment and retraction.

Provided is a cable having improved durability while enabling smooth bending operation. A cable formed by covering a conductor section, in which a conductor is spirally disposed in a longitudinal direction, with an insulating covering member having an insulating property includes: a conductor section formed by stranding a plurality of bare wires to form a core wire and arranging a plurality of the core wires closely in contact in an annular shape; and a reinforcement section including a cord that includes a plurality of filaments of a fiber material, and formed by compressing and housing the cord substantially linearly within a central space formed by the core wires in the annular shape in the conductor section, and the cord is press-fitted into the central space.