I used ARO ballast 2x110W
3 piece endcaps w/ standoffs (some made from acrylic)
URI bulbs
polished aluminim reflector.
pig tail (3 prong plug)
blue and yellow wire nuts
14 gauge wire (18 gauge is OK)
screws
you can buy the components individually and save a few bucks ,have to put together yourself, not difficult, the ballast has a wiring diagram on it.
you can buy a ballast pre-wired with harness and endcaps.
or buy a retro kit everything assembled and wired
I'd suggest doing a google for DIY lighting ,or similar topic, lot's of information out there with pics.
worked for me