Before I posted, I looked it up and thought originally it was a phenomenon in which light gets reflected through ice crystals in the clouds, so it looks purple. We’ve had cool, moist air for a several days, so this made sense. Even though the sun had set here, I thought maybe rays of were still hitting the clouds.

After reading comments here, it’s definitely Toigo Farms’ lights.

Thanks for the comments (and laughs) everyone!