Triangular craft with three white lights on corners of the object.

My wife and I were traveling back from a dinner in Palo Alto, CA to Napa, CA. On CA29, we noticed three white lights in a triangular shape. The craft followed the road in the same direction as our travel and then veered off to the left. We did not hear any noise from the object and it quickly disappeared after turning left. Although we were near an airport, the lighting, shape and size are what captured our attention. The lights were at the corners of the craft, were white, and we could see no port or starboard lighting (red or green). The craft was dark colored.
My wife was able to take two pictures with her iphone from the car. They are not great, but the lights and triangular shape can be seen.
Background: I am a former naval officer, and both my wife and I are business professionals.