Florange 1991, Lights in a triangle and a continuous sound

Summary

In March 1991, a witness in a car in the Moselle region (France) observed three lights arranged in a triangle in the sky. The phenomenon was accompanied by a continuous humming sound, adding an unusual auditory element to the experience. Despite the clear description provided by the witness, no other observers or additional information were available to confirm or expand on the details of the case. Reports like this, though sparse in data, are valuable for researchers trying to understand unexplained aerial phenomena. The case was classified as "C", meaning no conventional explanation could be determined.