triangular shaped craft with large blue lights

Huge triangular shaped craft with 2 rows of 3 huge blue glowing lights in a triangular formation with 2 blue lights parallel in the front. moving NW to SE at a high rate of speed much faster then a normal but not absurdly fast like some ufo sightings and was absolutely silent. it appeared to be flying aprox 5000- 10000 ft and was as long as 10 football fields and 3 football fields wide almost eiffel tower shaped. the blue lights were a whitish blue color not like any typical light I have seen. It appeared to be flying about 50 times faster then a normal plane that are seen flying in the vicinity. it was in my view for about 6-8 seconds and it made it across the whole skyline directly over head in that time. me and a another friend saw it so i know im not crazy and no we wernt looking for a ufo when we saw it. it also appeared to be some what transparent or cloaked. you could see stars through it but you could see a large triangular shadowy figure surrounding the lights. at first i thought it was a formation but after really looking at it you could see it was one ship.