Description

I saw two unidentified aircrafts last fall. Triangular, dark grey/black, 3 lights on the underside that pulsated and changed colors between green, red, and sometimes white.
One was flying a little low, the other much higher but it was the same kind of craft.

The only military aircraft I could find during research that came close to what I saw is the B-2 spirit bomber but there are still some key visual differences.