I run 2 6ft. rails, end to end- I made a "slave" for one rail, to which I built/ attached "outriggers". I connected the slave to the motor which travels on the other 6 ft. rail via a 6ft length of 1/2" band. I have the option of either running 2 single lights over 12 lineal ft. of table, or 2 lamps over one table. The setup was pretty easy to build, and it's been fun to play with.