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Since their invention 25 years ago, light sticks have become a Halloween staple. Although it could appear like mystical magic, the technology behind light sticks is actually extremely simple. In this article, we'll look inside a light stick to find out how it gives off such a strong light with no bulb and no battery.

The glow stick reaction is an example of chemilumenescence. The chemical reaction in a light stick involves many different steps. Commercial light sticks holds a hydrogen peroxide solution and a solution containing a phenyl oxalate ester and a fluorescent dye.

In nature, an example of chemiluminescence would be the firefly, which awfully efficiently creates light through a chemicalschemical reaction. Through economic chemistry we have also made a similar form of emission ; however [*COMMA] it remains not as efficient as that of a firefly. The most typical reaction used in novelty toys like glowsticks is that of Cyalume with hydrogen peroxide. Peroxides give off a lot of energy in chemical reactions, and so would be perfect for such an exact and efficient reaction. Cyalume is actually an oxalate ester ( phenyl oxalate ester ) which when mixed with hydrogen peroxide forms peroxyacid ester and phenol. The peroxyacid ester decomposes to form more phenol, and an energetic intermediate phase. As it decomposes into two CO2 molecules, it gives up its energy to a waiting dye molecule, which then fluoresces.

You may have heard that you can preserve or even re-charge your glow stick by placing it in the fridge. You cant re-charge it as the process can't be reversed but cooling a glow stick will slow down the reaction taking place inside - it may even almost stop so you can put them in the freezer for one week & when they de-frost the glow will come back.

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