Unexplained flashing lights coming from a home in Illinois have the internet scratching its collective head. Mysterious Flashing Lights Reported at an Abandoned Illinois HomeThe home, in suburban Plainfield, is abandoned and boarded up. On top of all that, there's very little explanation as to why the home is boarded up, or for how long the house has been abandoned. There is no plausible reason why the lights are flashing, but at this point, it's presumed non-threatening, but hey, maybe the place is haunted? With all of the unexplained phenomena, this might be one of the weirder things happening in Illinois.