Fireflies are a type of insect that can emit light that is clearly visible at night. This light is produced by "cold light" which does not contain ultraviolet or infrared light and has a wavelength of 510 to 670 nanometers, with pale red, yellow, or green, with beam efficiency up to 96%.
[IMAGE: https://ipfs.busy.org/ipfs/QmQc8xWoSbvjt8H1XeyAq3V1pwZkQFu9ppid2SMsNuANoY]
[IMAGE: https://ipfs.busy.org/ipfs/QmR6JwBMzWrsxjwzYT87pphy4RRGFbRnHxveeqsQgSezV8]