Experiment with Light
This photo is an experiment with using a light source during an extended exposure in an otherwise low light environment. The "light painting" source was actually a set of Lume Cube lights attached to a drone.
[I should note it was not completely dark as the drone can be legally piloted through "civil twilight" and only then when well lit.]
Canon EOS 6D Mark II, f/5 @ 23 mm, 3.2s, ISO 100, No Flash