It is really nice that you have a 365nm UV flashlight that runs on AA cells, with a good LG led as well. But it really needs a UV-pass filter (like a ZWB2 filter, I think that Sofirn can source them cheap in this size) to be useful for many applications, because the LG led emits much visible stray light that must be filtered out.
Sofirn, if you would like to know what this filter does, please read this test that I did a few years ago: 2mm ZWB2 filter tested (visible light blocking filter suitable for 365nm UV flashlights)
Kaidomain sells these ZWB2 glass filters in many sizes ( http://kaidomain.com/search&search=ZWB2 ), I’m sure that Sofirn can get them too, for cheap, and it improves the UV-flashlight enormously. These can be used to replace the glass lens at the front of the flashlight.