Saw it with a couple of mates in 1990 or thereabouts in Luxembourg. 3 lights, triangular shape with faded light in the middle passing by in the sky at night without sound. Only years later with help of the tinternet; I found out about the sighting in Belgium, so what was saw that night was most likely what was seen in Belgium (it was definitely heading that way). We were like: WTF is that!?, ....but at the time we only talked about it for a few minutes then had other stuff on our minds lol (only 14 years old back then)...