When I first started doing UV-imaging, there were many questions I had, mainly pertaining to which equipment would be worth buying. Hence I thought it would be worth sharing my experiences on this site, so others can benefit from the tests I have done while finding the right equipment for UV-imaging.
These are the 365nm UV torches I have bought (don’t bother getting the 395nm UV torches as they have more blue light than true UV):
Uses of UV torch:
1) To light subjects when adjusting focus in liveview (essential indoors or in the shade outdoors)
2) To induce visible fluorescence when shooting UV-induced visible fluorescence (UVIVF)
The Nichia-chip torches are the most powerful, with minimal visible-light leak, but are also the most expensive.
Be aware that the TANK007 and Ultrafire shots were done with the torch just above the amethyst, whereas the 2 Nightsearcher torches were much further away from the amethyst lighting from either side. Hence the longer exposure required for the Nightsearcher shot despite more powerful UV output.
If the UV torch is required for UVIVF, then the Ultrafire or Nightsearcher 365nm UV torches are the choice. If all you need is a small torch for lighting subject to aid focusing, then the TANK007 365nm 3W UV torch can also be a useable affordable option.
These are some UV torch holders I’ve bought which allow mounting to 1/4″ male threads.