Step 1: Parts You Will Need
Flat Head Screwdriver
Tin Snips or a dremel
Grounded wire pigtail (mine came from a florescent light, you could just cut the end off an old computer cord. Just make sure it has clearly defined wires. (i.e hot, neutral, ground.)
4" x 4" Handy Box
4" x 4" Handy Box Outlet / Switch Cover + included screws
600w rotary light dimmer + included screws and wire nuts (mine is made by Leviton and was the most inexpensive model at home depot.)
Lamp with incandescent bulb for testing.