A chemical light stick, also known as a glow stick or light stick, operates through a chemical reaction. Inside the light stick, there are two separate liquids separated by a glass ampoule. When you bend or squeeze the light stick, the glass ampoule shatters, and the two liquids mix.
One of the liquids contains luminol, while the other contains hydrogen peroxide. When these two liquids mix, a chemical reaction is triggered, releasing light energy. Luminol is responsible for the characteristic glowing effect, and the brightness of the light stick depends on the concentration of luminol and other chemical components in the stick.
Light sticks do not require batteries or electricity, and they are usually safe to use as they do not produce heat or flames. This makes them a popular choice for emergency lighting in various situations.