Any modern diesel that pulls more than a couple amps gets a quick trip to my workbench to see what's wrong. With four motors, I might allow up to 3 amps. Obviously, smoke adds to the total if you have it.
The old Pullmor open frame motors sucked a lot more power than the modern can motors.
If you're running one passenger train on a power district, it's normally not a problem. However, if you have two, and sometimes during an overlap, even three, all those amps equal a circuit breaker tripping.
Besides, the LED lights look better, they have zero chance of melting the shell (I've seen it), and the erosion of the rollers is vastly reduced with the minimal power draw.
