Electric current
It is not an actual "flow" of electrons in the everyday sense of the word:  If we examine the speed given to the electrons by the field, it is usually very small, on the order of millimeters per second.  It would take half an hour for electrons to cross a 10-foot (3 m) room at this rate.  Since a light bulb flips on almost immediately after hitting the switch, something else must be at work.