I saw 5-7 orange/red lights in a V shaped formation fly directly over my head with no sound emitting from the UFO.

I was taking the trash out and looked up at the clear night sky when suddenly my eyes were immediately drawn to these 5-7 orange/red lights in the sky. These lights were all the same size and were in a perfect V-shaped formation heading west to east just over Vacaville, CA.  These lights flew straight over my head and were moving extremely fast. I first thought that perhaps the orange street lights were playing with my eyes with a glare or something, so I ran into the middle of the street to see if anything would change but nothing changed whatsoever.  These objects were roughly 3000-5000ft in the sky . I suspected that this could be some type of military aircraft but the thing that made it clear that these were not military was how silent these crafts were.  No sound whatsoever, just lights.  This is my first UFO sighting and it matches how everyone else describes these crafts.