The sofirn UV is fine, but it does not come with a ZWB filter and you really need to get one. Look on fleabay or somewhere for a 19.5mm or even a 20.5mm (file it down, I just rubbed the edge on concrete until it fit). You can also look for a Convoy S2 or a jaxman mini uv, but
As far as the UI/FW issue, for a UV it isnt that important. You turn it on, you turn it off. There are no low/medium/high/turbo/strobe modes (or shouldnt be) to worry about, so the UI shouldn’t be an issue
As others have mentioned, you want 365nm UVB. You should still avoid looking directly at the beam.
AFAIK there are no legit UVC LED lights available. There are claims of some, and there are “sterilization” products available, but I doubt their efficacy and legitimacy. There are fluorescent bulbs & products available but that’s beyond the scope of this discussion.
As to what it can be used for… i’d say you’ll find out once you have one. Lots of unexpected things in fact. For instance it lets you spot a lot of stains you can’t see in you’re house - kitchen and bathroom especially. It can be pretty scary actually. Some minerals and woods do fluoresce and shine under UV light. Of course you can check bank notes to see how sophisticated they can be. It is not a light you use much often but it’s good to have one.
There is a very significant oversight here. If you find a good light, like the D4 or D4S, don’t you want more than one? If I love a light, I try and get it in every color. Recently, I have been loving the PD32 v2. Incredible light at $48 with discount.
Ok, I’ve ordered The Convoy with the installed filter to check if the lady I pay to clean my house is worth the money…… (wonder what she would be thinking if I’d start following her around with the light?)
It’s definitely something new for me so a worthy new addition to my collection.
Btw: over here where I live, it must be about the absolute opposite to a dessert, very few scorpions over here but maybe I can find funny glowing thingies in the water?
I used to use a UV light and injectible UV dye to find very small leaks in air conditioning systems. It was very expensive then, but would find leaks nothing else would. I think they use similar methods for other fluid leaks. It can also identify a murder scene with luminol spray.