an energy lens is created by the rapid change of water back and forth between gas and liquid in clouds. This lens causes energy to become coherent, resulting in lightning. It's like a gamma ray laser
It is more likely complete nonsense based on too many nights without sleep. Cite a reference.
Lightning is an electrostatic discharge produced during a thunderstorm. The electric current passing through the discharge channels rapidly heats and expands the air into plasma, producing acoustic shock waves in the atmosphere.