Sun Boy

The study of the history of the Legion of Super-Heroes inevitably leads to the study of many unusual superhero archetypes and attitudes. Whereas most teams consist of six or seven clearly defined characters, a group the size of the Legion has room for Wildfire’s snarkiness, for Dawnstar’s occasional narcissism, for the roguish charm of Ultra Boy, for Shadow Lass’ antisocial tendencies, even for Quislet’s complete disregard for convention. It also leaves room for your classic cocky womanizer, smart but not the smartest, charming but not the most so, certainly heroic but hardly a paragon. It’s kind of ironic that the Legionnaire with the smartest costume (one that lasted for over 40 years with virtually no changes) and the most heroic look is one of the most troubled and tragic LSHers of them all. This, then, is your Major Spoilers Hero History of Dirk Morgna of Earth… Sun Boy!
Sun Boy can internally generate a seemingly limitless amount of electromagnetic radiation, both heat and visible light. He is also immune to virtually all forms of heat and radiation (except when he was killed off during the "Five-Year-Gap" era).