larryd:
Suggest you 'not' run more than 10 amps on 18AWG.
power multiple sections with separate feeder cables to get 60 amps.
Not a problem. I will do separate power runs for every 2 strands. that should not be to much of a problem. Or I will just run Power Bus pair for each power supply. Split 500 lights per Power supply with 10AWG wire. Then pull power from the bus.
Will I run into any issue with the data wire?
and for the arduino...
ARDUINO DUE or MEGA 2560 R3?