HOW TO – Scorpion detection using ultraviolet (black light) LEDs

John writes – ” Some time after reading “A Powerful New Light Source for Ultraviolet Detection of Scorpions in the Field” I decided to build my own scorpion detection device instead of buying an uv flashlight. I ordered fifty 5 mm UV LEDs (light emitting diodes) at the website of LSDiodes.” Thanks Paul! – Link.