Originally Posted by RainmanP
Is that a piece of black pvc drain pipe? How is the light itself held in the mount? Grommet? Adhesive? Is there a back on the pipe or is it open?
You've got it: it's the flared-out end of a 4" ABS fitting, cut just past the flared portion. The light itself is too wide to fit out the narrow (tail) end of the ABS segment, and my roomie used zip-ties through holes in the sides to "seat-belt" it quite securely in place.
The back (facing front) of the assembly is currently open; I think he's going to attach a cover of some sort.
JAB