A lightstick is a portable handheld device that emits light, often used during concerts or events to create a vibrant and colorful atmosphere. It typically consists of a plastic tube filled with chemicals that, when activated, produce a bright glow. Lightsticks come in various colors and designs, allowing fans to show support for their favorite artists or teams. These luminous accessories are waved or held up by fans, creating a mesmerizing visual spectacle that adds to the excitement and energy of live performances.