thats a really awesome idea, and so practical as it last so long and heats your scran too!
i do quite a lot of woodland and ancient crafts and stuff, and with some students of mine we had to fill some time in a stone age crafts session, so
we made some lamps from stuff we foraged in the woods...
we found some sandstone lumps, rubbing two together actualy produces flat surfaces after a short while, so we fashioned them in to roughly a half
brick size. then we made a circular depression into them about as wide as a mug and an inch or two deep, using the broken edge of palm sized
then we stood up a piece of punky (ie dried and rotten) wood the size half a little finger in there (taken from inside a hollow dying tree), using
several tooth sized pebbles to brace it in place in the depression and stop it falling over.
we had to cheat for "oil" fuel though, using butter we bought with us for our toast, but if we were real cave folk we'd have had bear fat to render
down etc etc, though with another group we also used bacon fat that we had warmed on a stone by the fire (again, for snacks) .. as long as you can
melt a little of the oil into the punk wick, and then cover the pebbles with the oil they work a treat, fairly wind resistent and giving off a
surprising amount of light for a couple of hours too.
it only took about 15 mins to make, and to top it off we light them via a bow drill fire
we also used small rushes/cattails and slices of fomes fomentarium (sp?)/tinder hoof fungus for wicks another time too
gotta love making stuff when you're outdoors!
edit on 30-1-2013 by skalla because: the typo i spotted
edit on 30-1-2013 by
skalla because: clarifying some sh1t
ETA: i did have a camera phone pic of one but cant locate it... yet
edit on 30-1-2013 by skalla because: (no reason given)