What chemicals are in a glow sticks?
The glow light is made of two parts which when mixed together create the chemical reaction which makes them glow.
4 g sodium carbonate
0.2 g luminol
0.5 g ammonium carbonate
0.4 g copper sulfate pentahydrate
approx. 1 litre of distilled water.
50 ml of 3% hydrogen peroxide.

temperature affect glow stick / light sticks?
Yes, the warmer the temperature, the brighter the glow stick will glow. The heat will also shorten the chemical reaction time, which is of course the length of time that the light stick glows for. If it is colder, the glow stick will be dimmer and the reaction time will be longer, meaning that it will glow longer.
Here is a tip to get an extra half hour out of your glow light stick: To reactivate a “dead” glow light stick or glow light product you just put it into boiling water for about 30 seconds and it will glow again for up to half an hour.