I just purchased a UV Mini-Mag light from UV.flashlights.com and I have been having a ball with the light!! My girlfriend and brother have tried trading me out of this light. My girlfriend wants it to test her bathroom for stains, etc; and to just use for her house. My brother is amazed at what you can do with a UV light! Piers is a great guy to do business with, as he will answer all your questions promptly and he has built a great light! I knew nothing about such lights and Piers was more than helpful and I recommend him highly!! Just wanted to share!