The chemical light is disposable product. It operates on the basic of an chemical reaction which takes place when two of the chemical agents mix. You need to bend the lightstick if you want the chemical reaction to take place. The reaction is 100% safe. No heat energy is produced during this process. The chemical lights are an extraordinary light source because they do not need any power source. They are very light and efficient. They are perfect for signalization, marking the positions, distress information, accident site marking, equipping vests or as an alternative light source. The operating time depends on the color. The main advantage of the chemical light is that it illuminated the surrounding in the range of 360 degrees. The lights are non-toxic and non-flammable. The set includes a mount and a cord.