The Adventures of Superboy - Season 3 Episode 3 King Superboy
Overview: A small sun appears near Earth which causes sever electrical problems. Superboy destroy the small sun and head off into space to investigate. They discover a planet whose inhabitants are at war. The call Superboy their king and tell him that the suns are the weapons of their enemies. Superboy and Krypto head off and destroy the weapon that is making the suns.