Fluorescent & Neons: Aurora Borealis
The Northern Lights, also known as the Aurora Borealis, are ribbons of multicolored light that can be seen in certain parts of the northern hemisphere. They occur when electrons accelerate into the upper atmosphere along Earth's magnetic field lines. At that point, they collide with gas atoms and emit light. This reaction is similar to the way in which neon lights glow when an electrical current excites the gas inside a neon light tube.