"old work" box with a blank plate.
http://www.hammerzone.com/archives/e...oldworkbox.htm

It is the second part that is confusing me. How can I make the junction
box
accessible when I just need to lengthen the wire by about a foot in the
ceiling of a finished area? It wouldn't be a big deal to remove the
light
fixture, but "accessible" to me means the box is visible or in some
access
door.

The box is flush with the ceiling.


I've used Carlon boxes before in walls. So you're saying I need to put a
box in the ceiling with a cover? Man, that would be ugly.