Hi Ghost, I recently did some research on UV lights because I wanted to buy one. I have looked at the 2 “UV” torches you linked from fasttech and I didn’t buy them because they seemed to be emitting purple light which is visible.
Now, it all depends on what your purpose of getting a UV light is but ultraviolet light is actually not normally visible to human beings. If you wanted “true UV” you should be looking for wavelengths of 380Nm and below. I settled on a 3W emitter that produces light with a wavelength of 365Nm from ebay. It hasn’t arrived yet so I cannot tell you any more about it. I’m sure the other forumers here have more info. I seem to recall “2100” having a PT30 UV light from Tank007.
You may have seen the thread over here .