I don't think saying lightning is plasma is entirely correct. Plasma is a state of matter that basically exists when atoms become really energized, lose or gain some electrons and thus form ions. What happens in the case of lightning is that a very high current of electricity jumps from the clouds to the ground. read more
Electricity is plasma but normal electricity isn't, I mean thunder is Plasma, cause static electricity is Plasma every type of electricity isn't Plasma such as electricity converted from chemicals in the cells. Hope it helps. read more
I was wondering why a lightning bolt is coined as "plasma", or a "spark" from an electrical wire/device is as well, yet flares, molten lava, and burning buildings are not(flares are pyrotechnic, exothermic, and very much like flames). read more