I expanded our Christmas layout this year. Added 2 switches, some more Fastrack, and a 4-pack of the lighted Fastrack. I spread the lighted Fastrack out. I had one section on a loop, then 2 adjoining pieces on the section that connects the 2 loops, and one section on the second loop. I like the way the sections come on and go off in sequence as the train passes over them. In fact, I ordered another 4-pack to use on next year's Christmas layout.
My Christmas layout uses O-48 curves exclusively. Unfortunately, Lionel only offers the lighted Fastrack in O-36 curves. Maybe by next Christmas they will offer it in other curve radii.