Red lightning doesn't exist in the literal sense, according to the National Weather Service. The closest known phenomena is something called a red sprite, which occurs high in the atmosphere “directly above an active thunderstorm,” NOAA says.

What is the rarest color of lightning?

Green lightning is a rare phenomenon that can be seen during a thunderstorm. Someone who has seen green lightning is extremely lucky as green lightning strikes are rarely seen. It is so rare that the only photograph of a green lightning strike is one from when the Chaiten volcano in Chile erupted.

Is red lightning a real thing?

Sprites, also known as red lightning, are electrical discharges that appear as bursts of red light above clouds during thunderstorms.