How do you become white lantern?

To become a White Lantern in the DC Comics universe, a character must possess a strong will and the ability to harness the power of life itself, often linked to the emotional spectrum. The White Lantern Corps is associated with the embodiment of life and the ability to resurrect the dead. Characters like Hal Jordan and Kyle Rayner have become White Lanterns by wielding the White Lantern Ring, which is typically activated during a crisis involving life and death. The transformation usually reflects their personal growth and mastery over other emotional states.