I can definitely see the merits of grounding all avionics to a single bus, as well as the strobe light having its own, shielded ground. I have flown more than a few A/C that you could hear the strobe light pulses through the intercom. But nav/position lights (especially the low draw LEDs ) I dont think would cause interference.
Definitely a subject that I will be doing some more research on...
Definitely a subject that I will be doing some more research on...