UPDATE: I added supports to the rear of the bumpers:
When designing my new layout after my move from PA to CA two years ago, I needed to take advantage of every inch of real estate allocated. I love the look of Lionel's #0-25 bumpers, but they take up about 3.5" of the siding track.
I decided to "roll my own".
Using some scrap molding pieces, painted black with an LED inserted, I am quite pleased with the result. Since I have installed 27 of these on my layout, I calculate that I saved almost 6 feet of usuable track length in the process, since my bumper uses only about .75"!
The two wood plugs (painted reddish) cover the 1.5" screws that were used to secure the bumpers to the table top.
I wired the LEDs to light when the applicable track is powered. I control power to the sidings via TMCC SC-2s that provide "on" "off" to the tracks
If there is interest, I will send a "how to" article to OGR magazine for consideration.
Her are a few pictures: