White lights in triangular shape hovering for minutes then disappearing upwards and fading.I was driving from Monchengladbach army quarters to RAF Rheindahlen (a non-active base), it was a foggy night. I became aware of lights shining through the sunroof. I wound down the window but heard nothing. I could see a triangle of lights, i.e. one light at each corner. It hovered over for minutes then disappeared upwards and faded.