Ok Super, here's some sample shots of lit cars, in this instance a local suburban train, as you can see there is a small amount of extra light at one end of the cars, but for the most part at first glance the lighting is pretty even overall.
** Rear (inner red lights) - Note destination board lit also ** Note there is even a detailed interior to the cabs
** Front headlights + destination board **
** Single level car with interior lighting ** Note the detailed car interior
** Dual level car with interior lighting ** again note interior detail, it is even two coloured seats to denote the different levels
** Both lit cars **
** Shot with flash light on so you can see the livery quality of these cars **
** Rear (inner red lights) - Note destination board lit also ** Note there is even a detailed interior to the cabs
** Front headlights + destination board **
** Single level car with interior lighting ** Note the detailed car interior
** Dual level car with interior lighting ** again note interior detail, it is even two coloured seats to denote the different levels
** Both lit cars **
** Shot with flash light on so you can see the livery quality of these cars **
Happily collecting things all my life...