Abstract: A waterproof structure of a rope light includes a positive joint of a rope light, a negative joint of an electric cord and a nut; wherein, a V-shaped slot on a circumferential rim of a bottom portion of a jointing plane inside a positive joint of the rope light joints correspondingly with a cone-shaped head on a circumferential rim of a bottom portion of a jointing plane of a negative joint of the electric cord; in addition, a convex retaining ring disposed at a proper area of the negative joint of the electric cord tightly retains with a concave groove retaining ring disposed on the jointing plane inside the positive joint of the rope light to prevent liquid permeation, such as water, and to eliminate the short circuit and damage of the rope light so as to achieve the economic efficiency of being more convenient and safe.

Abstract: The present invention is directed to a plurality of light bulbs sets, are connected to a 2-core wiring, the positive end joints of the two sets of light bulbs, as well the negative end joints of two sets of light bulbs, are joined together by a process of twisting the two wires around each other, and in this way avoid the necessity of using soldering tin to weld the two wires together. One other part of the invention involves building an interior duct in the inside an outer PVC layer, so that flexible metal wire can be inserted into the interior duct, and in this way make the manufacturing process more efficient. Moreover, at the place where the outer level PVC layer connects to a female connector protruding type water-proofing is installed, and at the place the outer PVC layer connects to the male connector concave type water-proofing is installed.

Abstract: The present invention is a rope light structure, wherein several sets of light bulbs in series connection are disposed inside the hollow area of a transparent inner layer of polyvinyl chloride (PVC hereafter), the positive and negative pole terminals of the said several sets of light bulbs are connected in parallel with two core wires on two sides, an inner edge of transparent inner PVC layer is mounted with several arcuations, an outer layer thereof is covered by a transparent outer PVC layer disposed with several arcuations, thereby several arcuations are formed between the inner and the outer layers to define heat sink space for the light bulbs to facilitate the heat dissipation of the light bulbs so as to increase useful life of the light bulbs, to augment the brightness of the rope light so as to make multiple variations of refracting light.

Abstract: An extension cord includes: an extension cord having a plurality of loops formed thereon; and a plurality of sockets each connected with a loop of the cord and each socket having fasteners for securing the socket on a Christmas tree so that the extension cord can be concealedly mounted on a Christmas tree for further connecting plural lighting-bulb sets in the sockets for better decorative effect.