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The latest research has found that LED lights in the form of firefighter-inspired lenses require less energy to emit more light. Scientists have developed a lens for LED lights that resembles the small folds covered by fireflies' "lanterns." This lens allows 98% of the light to pass through it, which is better than a conventional light bulb and this improvement is similar to applying an expensive anti-reflective coat to the bulb.
Korean researchers have developed a new high-transmission LED bulb inspired by the fire-fighting pattern of fireflies
Researchers at the Korea Advanced Science and Technology Research Center conducted a study on the belly of fireflies using a scanning electron microscope. They found that the part of the lantern that glows in the abdomen consists of three layers and has obvious similarities to LED bulbs. A standard LED bulb consists of a reflector cup and a lens-clamped source. Similarly, a firefly lantern consists of a reflective layer, a luminescent layer and a stratum corneum or a carapace covered with fine folds. Compared to the remaining part of the shell of the firefly, the folds of the light transmitted by the firefly's abdomen are quite neat and orderly.
Researchers have found that this pleat helps the firefly's special light wavelengths pass through the firefly's lanterns more efficiently, so they try to etch a similar pattern with plastic. As expected, creating a similar pattern on an LED bulb can transmit more light. Researchers say the technology can be used to enhance the light of camera phones, flashlights, headlights and even home lighting.
This inspiration is not the exact case borrowed from Mother Nature, because artificial LED bulbs are more tidy and regular than the tail of a firefly. The researchers used nano-etching to package the bulb into a honeycomb shape rather than a long fold like a firefly. But like a real firefly, this pattern seems to be most effective when the light is 560 nanometers in length or similar to the yellow-green light of fireflies.
Researchers say that not necessarily means that we will all carry the firefly-colored lights. This nanostructure can be altered to enhance different wavelengths. Transmittance is very sensitive to the shape of the nanostructures, which can be optimized for a particular wavelength of light.