You could do a custom glass chandelier cascading all the way down. We have many different glass designs to choose from. Below are some images for reference.

hanging a light from the 16ft is an option its just how much do you want to sink into it.

otherwise you could go back with track and run it width wise and just add track heads.

you could also go back and add wafer style LED "recessed" lights. you could also hang the track on the green wall above the table and face the lights down.