>>2854190I use it to hunt coolant and refrigerant leaks on cars, or finding uranium glassware in op shops. As for the bush, nothing in particular - it's just a nice light show. The lichens in the last pic appear white to the naked eye. Arachnids have prominent markings under UV and I've seen my fair share of spiders, mostly orb weavers, but I'm yet to see a scorpion. An old colleague of mine had some and they looked pretty neat with it.
I found this bollard along a trail where the mycelium wasn't evident under visible light but glowed brightly under UV, so there's finding rotted wood as a fringe use case...