Also, take a look at member, Xenopus's, sight. On that sight is a pdf spread sheet that speaks volumns in a small space.
It varifies that the Cree would be premium for scorpion hunting. Real world use could be varified by tvodrd. I'm looking forward to purchasing one of HarryN's run of CR2 Side-By-Sides with a Cree UV in it. McGizmo has built some Crees using a reflector with proper geometry hosted by some of his wonderful machine work and they are available at the the shoppe.
Lunal Tic is the owner of an exotic McGizmo built Nichia unobtainium UV. This is a awful light with an existance of no purpose that I would admit to other than to cause my face to light up as if a 5W cyan was blazing away on me. Just because I like Lunal Tic, I would be willing to take it off his hands for 10 - 15 bucks...maybe more.
For actual usage, the kitchen is the target. If I make something with eggs, that night I look for any egg material that escaped clean up. If I make a poultry dish I look around for any bacteria that may be growing later. I don't find that anymore but I find little splatters of egg consistantly.