was thinking of the WF-105B last night,
found all 4 that I have,
I have red, green, blue, and blacklight versions
but I don't have a white one,
it is not the best of my cheep flashlights either,
the trustfire TR-C2 is really my favorite due to the springs on each side of the battery,
even when running multimode chips it does not change mode when you shake it to hard (or when it gets old),
currently running a single mode Cree Q5 in it (runs on 3.7 to 18V)
would love a Cree XM-L LED for it
so why am I rambling on...
not sure
one other random thought is that most people can't really see with only blue light without practice
you get huge contrast and no color to speak of,
so it just confuses many people for quite a few min. when first using one
it can be handy to have a light that most people can't make full use of, but you have practiced, so you can.