"This is… unbelievable. Files. On people. Like she was a spy."
Archie nodded, smiling. "A lovely treason, hm?"
I could not speak. He led me out into the dazzling light (31.44-46).
In this instance, like in so many others, Archie takes Leo into the "light." In other words, while Stargirl leads Leo from "a gray world of nothings" into a world of color and wonder, Archie leads Leo from the darkness of his own ignorance into the light of knowledge and truth. Now there's a happy ending.