so i am doing something a little different than planed, I was planning on doing a full rewire of the fixture, but platt(nation wide electrical supplier) found a troffer light kit for $107 that is 6 screws and connect 2 wires. it goes from a 4 bulb too 3, but more light out put and led. I will have the part numbers tomorrow when I pick it up.
while it may not fit your exact app, having to do zero wiring other power connect saves a bunch of time. and when you consider that too replace all 4 lights with led tubes and new tomb stones is ~ $90 anyways... the 20ish mins it will save me is worth the $27 bucks.( at least too me, should be about a 5 min install)
stay tuned