String lights are decorative lighting products composed of multiple light-emitting units connected in series along a flexible line, which undertake spatial atmosphere creation, contour decoration, and auxiliary lighting functions with flexible forms and rich light and shadow effects. They are widely used in holiday celebrations, commercial beauty, home beautification, and outdoor lighting scenes. Its core structure includes luminous beads, conductive core wires, insulation sheaths, power access components, and some models are equipped with dimming control modules. LED chips are commonly used for light bulbs, which have the characteristics of high light efficiency, low energy consumption, and low heat generation. They can provide a variety of light color options such as warm white, cool white, RGB full-color, etc. Some products support dynamic light and shadow modes such as gradient, breathing, chasing, and flashing, adapting to the atmosphere requirements of different scenes. The wire body is wrapped in insulating and flame-retardant material, which is flexible and can be bent and coiled freely. It can be arranged according to the outline of the building, green plants, and irregular structures, with high degree of freedom in design. According to the usage environment and protection level, string lights can be divided into two categories: indoor and outdoor waterproof. The indoor line is lightweight and slender, often using ordinary PVC sheaths, suitable for dry scenes such as Christmas tree decoration, indoor background walls, window displays, desktop embellishments, etc; The outdoor protective cover is made of weather resistant modified materials, and the lamp beads and wiring joints are sealed and waterproofed to achieve the corresponding IP protection level. It can withstand sunlight, rain, high and low temperature changes, and is not easily yellowed or cracked when installed outdoors for a long time. It is commonly used for building contour lighting, courtyard tree decoration, scenic area trail decoration, outdoor activity layout and other scenes. Compared to traditional incandescent string lamps, LED string lamps have lower energy consumption and longer service life. During operation, the temperature rise of the lamp is small, which is less likely to cause burns and fire hazards, and the safety performance is significantly improved. The product supports multiple parallel expansion groups, which can meet the deployment needs of large-scale scenarios; The control methods include constant light basic models, button switching models, remote control adjustment models, and low-voltage safety models. Among them, the low-voltage string lights are powered by human safe voltage, which is more suitable for close range decoration scenes that are easily accessible to the human body. This type of product is widely suitable for various scenes such as holiday celebrations, wedding decorations, commercial stores, dining spaces, home balconies, courtyard landscapes, stage backgrounds, etc. It can not only outline the contours of buildings and objects to enhance visual hierarchy, but also create a warm, lively or romantic spatial atmosphere through softening light. It is a basic category in the field of decorative lighting that is convenient to install and has rich forms.