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The light that a firefly creates is the result of a combination of four different ingredients. This light is produced through a chemical reaction involving Luciferin, which is a substrate, Luciferase, an enzyme, ATP, and oxygen . The light producing section of the body is located in the sixth or seventh abdominal section of the firefly. It is within this cavity that the two compounds Luciferin and Luciferase are stored. A firefly will draw oxygen in through its complex system of air tubes and expose the oxygen to the Luciferin and the Luciferin will then oxidize and activate the Luciferase. This will generate a light that will shine through the skeleton of the abdomen. It is important to note that scientists disagree about the method that the fireflies use to control the duration of their flashes. One theory, known as the "Oxygen Control Theory", explains that fireflies can control the length and duration of their light by regulating the amount of oxygen that they intake . If little or no oxygen reaches the part of the firefly known as the phonic organ, the chemical reaction will not be extremely strong and the light of the firefly will not shine very brightly or for a lengthy duration. Another theory, known as the "Neural Activation Theory" states that fireflies have neural control over the activity of structures called "tracheal end cells" . These structures aid in the initiation of the chemical reaction. Whether or not the fireflies have physical or neural control over their ability to produce light, their method of creating the light that emanates from their bodies is extremely efficient. Very little heat is given off of this light which means that not very much energy is wasted at all. This "cold light" has a 96% efficiency rating; which, when compared to an incandescent light that has only 10% efficiency, is rather impressive.

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15y ago

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