glow sticks

Glow sticks are portable light sources that produce illumination through a chemical reaction called chemiluminescence. Inside, they contain separate substances—usually hydrogen peroxide and a fluorescent dye—within sealed compartments. When you bend or crack the stick, these compartments break, allowing the chemicals to mix. This triggers a chemical reaction that releases energy in the form of light without heat. The glow's color depends on the dye used. Glow sticks are commonly used for entertainment, safety, and decoration, offering a safe, flicker-free light that lasts from minutes to several hours depending on the size and chemical formulation.