Honestly for scorpions even the cheap 395nm lights work just fine. Of course none of them are constructed very well and they use very cheap emitters that put out less light and more visible light compared to nicer ones like the Convoy/Jaxman/Sofirn. If there's no way for you to get one of those soon enough, I would recommend that 51-led model (from any brand name...they are pretty much all the same although I see a couple with newly designed hosts like this Youthink version). I have one of these that I started out with and it will light up scorpions fairly well in a light turquoise color from at least 4m away - with fresh cells it will reach 6m or a little more but it drains fairly quickly with the 3AA source. I would not spend the money on that Jetbeam or any of the other smaller tube/zoom lights because while some are made a little better and/or take an 18650 cell, they just don't put out enough light and they are usually grossly overpriced. Those are better for indoor-only checks and IDs/licenses...sometimes currency. The 395m does emit a lot of "wasted" visible light, but that can actually be useful to you outdoors by helping to see brush or rocks and limiting eye strain somewhat. 395nm also irritates the scorpions to where they will run away when the light gets near them, where 365nm seems to keep them calm for a little bit (if you want to take photos or are trying to collect them). You don't need the filter glass lens for this but that does make for nicer viewing in a more powerful 365nm light with a good emitter. When you have time to wait and if you still have the need, the Convoy/Jaxman/Sofirn are definitely worth the slightly higher cost, and they are more fun to explore with because they will light up plants, mosses, fungus, etc that the 395nm will not, and are also very good for auto/HVAC leak detection. I'm in the process of building a Sofirn C8F with three LG 365nm emitters because while the Convoy is great, I'd like to have more oomph for my scorpion finding and nature exploring.
https://www.amazon.it/YOUTHINK-Lampada-Ultravioletta-Animali-Scorpioni/dp/B07GQN3793/ (if you can find these in the 365nm wavelength, I would pick that but I couldn't find any on amazon Italy...did see this one on your Ebay but it's unclear whether it is really 365nm or not: https://www.ebay.it/itm/New-51-LED-365nm-UV-Blacklight-Ultraviolet-Flashlight-Torch-Inspection-Detection/254189499680)
Here's an example of what you will see with the cheap 51-led 395nm...the "undesirable" visible light helped with the photo focusing and made the crane fly he's having for dinner show up better. Under 365nm these bark scorpions look more greenish-yellowish. Many scorpions turn more of that color instead of blue, just depends on the species, so possibly the African friends of yours won't look blue at all no matter which wavelength you use, I don't know.
