Aurora Borealis (Northern Lights) and Aurora Australis (Southern Lights) are not a natural source of light in the traditional sense. They are a phenomenon that displays light, but the light itself originates from the sun.

Here's why:

* Solar Wind: The sun constantly releases a stream of charged particles called the solar wind.

* Earth's Magnetic Field: This solar wind interacts with Earth's magnetic field.

* Excitation: The charged particles from the sun excite atoms in the Earth's upper atmosphere.

* Emission of Light: These excited atoms release energy in the form of light, creating the aurora.

Therefore, while the aurora is a beautiful display of light in the sky, it is not a source of light itself. It's a visual manifestation of the sun's energy interacting with Earth's atmosphere.