Fireflies have light-producing chemicals in special organs inside their abdomens. The light produced by fireflies has been called perfect light. This is because in the production of light, no energy is wasted as heat. A light bulb does not produce perfect light like fireflies. If you have ever touched a light bulb after it has been on for a while, you know that the light bulb gets very hot and you have to be careful not to burn yourself.
Fireflies use their light to attract mates.
Males fly around flashing their light off and on trying to attract a female. The females sit on the ground and flash responses to the males. Different species of fireflies use different flash patterns and rhythms. Some species may only flash at a particular time of the evening. This is a role-playing group activity.