Passenger car lighting

Very recently, as of several years ago, they still used incandescent bulbs.

Thanks. There's a set on the for sale I would like to have but probably not LED. MTH dates it 2006.

I have a number of MTH passenger car sets from that time and they all have incandescent lighting, not LEDs. I'm not sure but I don't think LEDs were factory installed until much later, possibly 2013/14. 

No way they have LED's, that's only been in the last couple of years for both Lionel and MTH.

I have a set from 2013 I thought were LED but they're not. Guess I should have looked before I asked. Bad habit of mine.

Thanks

They can be LED.