Clearly not a duplicate! of Why does the International Space Station have a downward facing light?
This answer to How does the Starlink satellite shine? begins with
Starlink (and other satellites) categorically do not have exterior lights or illumination, that would be a waste of power for no particular benefit.
and that got me thinking. FITSat-1 was a 1U cubesat and had a bunch of LEDs on its exterior. It was programmed to blink Morse code and designed to be visible to people on the ground.
Question: Is this the only case of a satellite equipped with lights designed to be seen by people? I'm primarily asking about satellites that were built and ready to fly rather than plans or designs.
From eoPoportal's FITSat-1 (Fukuoka Institute of Technology CubeSat) / Niwaka