Originally Posted by ToeJoe
I have rewired the whole house about 2 years ago and the duck work would be OK, junction boxes are OK also not behind any drywall. The only thing would be the canister lights which has to come through ceiling.
If you use an old work can you can actually remove it since it is clipped to the drywall ceiling after it is installed. You run a loop of wire to each location you want to put a can and then cut the can in after the ceiling is installed. Alternatively make sure you test your cans before you close the ceiling because accessing them after the fact can be a real PITA.
That said, look at this LED can light replacement. They'll mount to a regular round ceiling box, no can required. They can be installed in a can, but they don't require one and a ceiling box is a lot cheaper than a can.