Can I add cords to recessed light fixtures to make them portable?
The NEC doesn't care what type of light fixture you cord-connect as long as you aren't burying the cord
The NEC's provisions for using cord-and-plug connections for light fixtures (luminaires) don't discriminate between luminaire types.  So, as long as you are using correct clamps in the fixture knockouts to strain-relief the cord to the box, mounting the fixtures securely so they don't strain the cord, and leaving the ceiling unfinished, you should be good to go.  Just keep in mind that if you ever do decide to finish the ceiling, you'll have to swap the cords and receptacles out for ½&quot; KO face plates and fixture whips.