The light produced by the firefly is the most efficient light as nearly 100% of the energy is emitted as light. In comparison, an incandescent light bulb only emits 10% of its energy as light, while the other 90% is lost as heat.
If you board on a river cruise at night along a stretch of mangrove mangrove vegetation, you may be amazed by the fascinating display of lights resembles the Christmas trees! The lights are emitted by the tiny beetles of the Pteroptyx tender to attract suitable partners. This species of firefly especially fond of putting up their show on the Berembang trees (sonneratia caseolaris).