Real Name: Garth Ranzz
Lightning Man possessed the power to control and hurl super lightning blasts, and he was a member of the Adult Legion of Super-Heroes.
Lightning Man, Cosmic Man, and Saturn Woman traveled back in time to present day Metropolis to visit their good friend and fellow Legion member Superboy, now grown up and known as Superman. The Legionnaires aided the Man of Steel in his battle against the combined threat of Lex Luthor and the Legion of Super-Villains.
(S No. 147/3, Aug 1961: "The Legion of Super-Villains"; and others.)