Butterfly wings work like LEDs
"We can see how a flower blooms and grows and systematically displays multicolors: one side a little spot, another side a little spot, white on one side, more white on the other side. The butterfly also exhibits such artistic symmetry. So this is all being painted, but in such a perfect way and so swiftly that we cannot see how. We cannot understand how it is being done, but it is being done by the energy of the Lord."
SSR 8 Attaining aperfection: Knowing the Purpose of Life
"When scientists developed an efficient device for emitting light, they hadn't realised butterflies have been using the same method for 30 million years. Fluorescent patches on the wings of African swallowtail butterflies work in a very similar way to high emission light emitting diodes (LEDs).
These high emission LEDs are an efficient variation on the diodes used in electronic equipment and displays..."
Full Story on LEDs and Butterflies