102pcs Luminous Glow Sticks Straws Night Club Bar KTV Cheering Props AU SELLERThey will glow super bright for 3 5 hours. Then, they will start to fade out but may continue to emit some light for up to 12 hours. Inside the glows stick bracelets are two chemicals that emit light or glow when they are mixed together. Inside the glows stick is a thin glass tube, when you bend it for the first time, you break the inner glass tube. This mixes the two chemicals together. Just shake it up and presto, it starts glowing like magic.