Hellooooo!!!! I bought these LED's from a guy in China about 3 months ago.As you can see in the photos,They are just basic LED's off a strip and they have a hot and a common wire wired onto them,that I assume goes to the "Hot" of where the original light power got power from.The Black "Common"should then go where???,to anyplace I can get a ground? My biggest concern with these is: Do they need some kind of resistor,or capacitor in the circuit also?? Can they handle 18-20 amps??,without some other electronics so they don't French FRY on me??? The backs of the strips are what looks like gold colored boards,and once the tape is removed they are very sticky,and could come in handy even if they will not work with the passengers???Pardon my ignorance,and any help or suggestions(including throwing them away) ah verly mucha appreciated.
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The strips already have resistors soldered onto the strip, however, too much voltage will cause the LED's to burn out prematurely. 
Also, I believe this type of LED is the 12 volt type but they can be used with the proper type of AC to DC converter if you are going to use track power. Gunrunnerjohn promotes, through Henning's Train store, a really compact little circuit board that does just that and at a reasonable cost. 
Also, there are schematics out there that will help you out if you decide to "roll-your-own". 
BTW, you could just hook the individual strips to a 9 volt battery and that will work too. Be patient, there are plenty of folk waaaaay smarter than me on the forum who, I'm sure, will be glad to help out! 
