What is an electrical discharge in the sky?

An electrical discharge in the sky typically refers to phenomena such as lightning, which occurs when there is a buildup of electrical energy in the atmosphere. This discharge happens when the electrical potential between clouds or between a cloud and the ground becomes strong enough to overcome the resistance of the air, resulting in a rapid release of energy in the form of a bright flash and thunder. Other forms of electrical discharge can include sprites and elves, which are transient luminous events occurring high above thunderstorms.