What do the people of Maple Street see just before they notice the electronics failure?

It appears you are referring to an episode of the television series "The Twilight Zone" titled "The Monsters Are Due on Maple Street." In this episode, written by Rod Serling, the people of Maple Street witness a series of strange events before the electronics failure occurs. Just before the power outage, they see a bright light pass over Maple Street in the sky.

The bright light triggers a series of suspicions and fears among the residents of Maple Street. They start to question the unusual occurrence, and paranoia sets in. As they attempt to understand the source of the light and the subsequent power outage, the community begins to turn on itself, suspecting their neighbors of being responsible for the strange events. The episode explores themes of paranoia, fear, and the breakdown of social order in the face of uncertainty.

If you have more specific details or questions about the episode, feel free to provide additional information.