[3] After finishing third, he began working on "Traffic Light," and released the song three months after the show's conclusion.

The songs concept is a reference to a line he said during his initial performance on the show, where he stated he was "a yellow light type of singer.

[5] The music video for "Traffic Light" was published 14 May 2021, and shows Lee meeting his friends in a forest cabin for his birthday.

He hops in their car, and they make their way to a nearby lake where Lee plays his friends' music while they drink coffee by a campfire.

The music videos ends with Lee's birthday party, and quick flashbacks to previous points in his day.