This tunnel is 300m long and I placed spots every 10m. Each mouth has two more spots for a total of 34 spots. The tunnel itself is lofted, and each tunnel light model is two lights set apart at the correct distance to help with placement. They do not cast the light; I set those up using the default point light object.
In addition to being just pretty as all git-out, it also happens to suck the life outta the frame rates. Now, my system is just barely over the threshold for TS2012, and she still gets The Pasly even with all settings on Flinstones (except TSX. Won't do without that). But there will be no racing into these tunnels until we get a major upgrade. The future does look brighter!
The tunnel occurs inside the boundaries of a National Park, and so certain artistic demands needed to be met, along with ability to get passengers out of a smoking tunnel.