the significance of "the lights went out again. Archie and Obie sat there awhile then made their way out of the place in the darkness.

The significance of this quote comes from the fact that it exemplifies Archie's control. Placed in the section directly after the fight, we see Obie apologizing to Archie, and because of it we come to understand that Archie's position will always be secure..... at least until he graduates.