Triangular shaped craft over Route 2

I was driving east on Route 2 towards Boston a little after midnight when I saw a low flying craft in the sky a little ahead of me. It was heading in my direction over the highway. It had fairly nondescript blinking red and blue lights on it, and a very bright downward facing white light on the underside of its nose. I assumed it was a helicopter with a search light on, and turned my head up to look at it as I passed underneath. To my surprise, however, it had what appeared to be a V-shaped formation of maybe 4 or 6 lights on the bottom, with the brightest light serving as the center point at the front of the V shape. It did not appear to be moving in any sort of extraordinary manner, and everything that I saw aside from the V shaped formation seemed consistent with it being a helicopter. I was also near Hanscom Air Force Base in Bedford/ Lexington, although the object appeared to be too slow moving for it to have been an airplane. I have seen things that I would generally classify as UFO’s on at least 2 previous occasions, and am generally accepting of the idea that there are things in our skies that we lack a solid understanding of. There is definitely a part of me that wants to be able to say that I saw something that we cannot explain through conventional knowledge, so I am fully accepting that there may be some cognitive biases at play here. That said, I’m mainly posting here on the off-chance that someone else saw the same thing and was similarly unable to identify it, as there were numerous other cars on the highway at the time and it is a fairly densely populated area.