Hydrogen peroxide, water, luminol, ammonium carbonate, sodium copper sulfate pentahydrate can be combined to produce a chemical light stick. When these chemicals are mixed, they react to produce chemiluminescence, which is the emission of light from a chemical reaction. The light is produced when the luminol is oxidized by the hydrogen peroxide, in the presence of sodium copper sulfate pentahydrate as a catalyst. The ammonium carbonate acts as a base to neutralize the acidity of the solution and increase the rate of the reaction. The color of the light produced depends on the concentration of the chemicals used.