Mysterious lights in Bucegi

A few years ago, in a nopate, and Deer Valley have seen a series of strange lights, on the south-eastern Caraimanului.
Given existing conditions, night, sometimes fog, wind and even rain, but where they occurred at mid-vertical wall in different positions, the idea was ruled out of climbers ascending.
One of the lights came off the slope, made a loop through the air and majestic tusks Miller disappeared without losing its intensity and shape.