The best brand of glow sticks on the market. You will receive 25 FlashingBlinkyLights Premium luminescent light sticks. Once they start glowing, FlashingBlinkyLights brand Premium glow light sticks will last you all night. They will glow super bright for 8 - 12 hours. Then, they will start to fade out but may continue to emit some light for up to 36 hours. We are constantly getting new shipments from the factory, so you know these are as fresh and new as they come. Inside the glow light sticks are two chemicals that emit light or glow when they are mixed together. When you bend it for the first time, you break the inner glass tube which mixes the two chemicals together. Just shake it up and presto -- it starts glowing like magic! FlashingBlinkyLights glow-in-the-dark products are non-toxic. They are not radioactive and they are not flammable. They almost never break open, but if they do, the chemicals inside can be washed off skin and clothes with ordinary soap or detergent.