I was driving to Momence from Chicago when just south of Grant Park, IL, I started taking photos of the lightning storm. I have several photos leading up to the pyramid shaped lights that show nothing in the air. Then several that show a distinct shape of a blue, red, and yellowish lights that is stagnant in the air. It was not visible to the naked eye. The storm was severe and I didn't analyze the photos until I reached my parents' home. I sat in my car trying to explain this with dashboard lights or some other reflection but I'm afraid I'm stumped.