The “warm” glow of fireflies

In Sungei Lebam, Desaru, Joshua held a firefly in his hand. He exclaimed “It was quite warm but it didn’t burn my hand”.

“Just about 100% of a firefly’s light is given off as light.

By comparison, a normal electric bulb gives off only 10% of its energy as light, while 90% is wasted as heat”

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