Light sticks are portable, glowing devices that produce light through a chemical reaction. They typically consist of a plastic tube containing two separate chemicals. When the tube is bent, the chemicals mix, creating a bright glow. Light sticks are often used for safety, decoration, or entertainment during events like concerts and camping. These items come in various colors and sizes, making them popular for parties and celebrations. They are also commonly used in emergency situations, as they provide illumination without the need for batteries or electricity. Light sticks are a convenient and reliable source of light in dark environments.