This is a really nice pendant light set.  We used ours in a stairway to the basement. Since the pendants were a about a foot too long, we were able to shorten the lengths.  
  Here is how you can do it. I am sure it would void any warranty, but warranty isn't that long anyway.  You remove the mounting bracket and cover plate. You will need to pull the cords through the top till you achieve the length you want and re secure the cords at the base plate with the tightening piece that the cord runs through.  Then you must cut the cords at the top and then re secure with electrical wire nuts.  Of course you can have an electrician do this work as well.
We love how the lights look, as we added Edison bulbs in all three.
One star removed only because these should be made such that they would be easier to shorten and instructions should be supplied on how to do this.