2AA light modified by former member AB with a side emitting UV LED. Same as in the writeup on this page:
http://www.candlepowerforums.com/ubbthreads/showflat.php?Cat=&Board=UBB8&Number=201010
Only used for a few minutes to light up some fluorite rocks.
http://www.candlepowerforums.com/ubbthreads/showflat.php?Cat=&Board=UBB8&Number=201010
Only used for a few minutes to light up some fluorite rocks.