Billiard light installation?

Hello,

I need some help on determining what kind of wiring to buy to hang my light. The light as it stands now has a 6 ft. cord (male-end) which is designed to be plugged into a ceiling receptable.

I plan to remove an existing light fixture in the ceiling to connect my billiard light into. The ceiling in this room is 20ft tall so I will need to extend the cord coming from the light.

Questions:

1.) Is it possible to build my own extension cable out of lamp cord? ie. female plug on one end and bare wire on the other to hard-wire to ceiling?

2.) What parts would I need? Im concerned about ground as all lamp cords I've seen are just hot & nuetral.

Thanks,

pip9ball