What r the 2 substances that react in glo sticks to provide illumination?

While there is more than one way to make a glow stick, the most common ingredients are a solution of hydrogen peroxide and a solution of a phenyl oxalate ester along with a fluorescent dye. The reaction between the two chemicals releases energy and excites the electrons in the fluorescent dye, causing them to release light. The color of the dye is what determines the color that's released.
Updated on Monday, February 06 2012 at 08:02AM EST
Source: chemistry.about.com/...