@Aaron G. posted:It would seem odd to me they couldn't run on DC power since LEDs usually run on DC.
Not odd at all, they obviously convert the voltage to DC for the LED's. Remember, Lionel TMCC & Legacy both specify ONLY AC, yet they have tons of LED's.
The might run at one polarity, and when they had a different polarity, they might not. Without seeing the details of how the power is converted, it's pretty hard to say why they specify AC.