I like your tunnel support.
If you're interested in lighting it it's easy enough.
Not a tunnel, but an overhang. Done with pre-wired super bright 3mm LEDs from that auction site SeaLevel mentioned. They're mounted in 'diffusers' made from the textured edge of a CD case.
Tunnel lit with 3 'wide angle' super bright LEDs from local electronics store. These have since been given a coat of Tamiya Clear Yellow because I didn't like the cold white light.
Have fun
Embs
If you're interested in lighting it it's easy enough.

Not a tunnel, but an overhang. Done with pre-wired super bright 3mm LEDs from that auction site SeaLevel mentioned. They're mounted in 'diffusers' made from the textured edge of a CD case.

Tunnel lit with 3 'wide angle' super bright LEDs from local electronics store. These have since been given a coat of Tamiya Clear Yellow because I didn't like the cold white light.
Have fun
Embs