I wanted to build this example of a tunnel some years ago, but to get the right look I would have had to use Lightmaps or some other special tricks.
Now that we have RectArea Lights I can be lazy while creating my creepy tunnel and just use the built-in tools to tweak the visuals
Having sound is half the experience, so I recommend some speakers.
Because there are many AreaLights its heavy on the GPU. On mobile you may want to adjust the number of lights using the
lights argument (http://weiserhei.github.io/tunnel/?lights=2)