You gave me an idea RJR.
I unplugged my Lionel Trainmaster Type 1034 that I use for a few houses , An 8 light Lionel floodlght ,a couple small light towers , a lighted bridge and a couple of Pennsy overhead signal bridges and a 3 light track signal some of which I suspected might be hooked into some track lockon.....but...
I unplugged the Trainmaster 1034 and plugged it in several times now while observing the results of what was getting power. All seemed good with no power from the tracks.
On the operating devices I have infrared readers .the operating water station and the 5 switches are track powered. There are MTH lockons.