From back in time I spot this question, and have an answer.
I had the same question and called Desa International, the makers of
You need 3 conductor wire between the fixtures. Red is the control
line - just connect it on all lamps. Wire all white to white, black
to black and red to red. You can wire as many lamps as master of the
others as the circuit will handle. On interconnected smoke alarms,
there is a control wire. I bet motion sensor lamps at similarly.
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