Folks,
I have the lighted green FasTrak that came with the new Area 51 Railroad Set. Same design as the multi-colored track.
Here's a shot of the underside. Can see there's an opening where you can feed a power wire and attach with spade connectors like regular FasTrak. Still need to remove the plate on bottom of the track first. Also, can see the jumper referred to above.
I plan to do this and use a transformer for power rather than the supplied wall wart.