How does a glowworm emit light?

The light that glow worms create is known as bioluminescence, a light created by chemical reactions that take place inside an organism's body. This is sometimes called "cold light," because the luminescence produces hardly any heat; the worms do not have the resources to produce an energetic reaction and must conserve all the resources they can. read more

‘Light production in fireflies is due to a type of chemical reaction called bioluminescence. This process occurs in specialized light-emitting organs, usually on a firefly's lower abdomen. The enzyme luciferase acts on the luciferin, in the presence of magnesium ions, ATP, and oxygen to produce light. read more

The glow worms emit a pale light which attracts insects toward the sticky threads of their snare. The blue/green light is a product of a chemical reaction between luciferin (a waste product), the enzyme luciferase, adenosine triphosphate (ATP - the energy molecule) and oxygen. read more