I have the big and little Den Haan maps.. The little one was gifted to me, and works quite well as a backup anchor light, and for warming up the cabin. The big one has never burned right, and is way too large for use as a backup navlight.. I didn't think carefully enough about the dimensions when I ordered it, and when it arrived I didn't feel like paying to ship it back, and a restocking fee, so I kept it... don't know what to do with it now.
I ordered a couple of cheap brass lanterns from http://www.y2klanterns.com/
and was pleased. Not much use anymore since little LED flashlights last forever and provide much more light at much less cost than burning paraffin.
Here is my new backup and primary anchor light
mounts on top of my radome and batteries last forever!!!