Earlier this year, I moved to an area which I discovered is overrun with scorpions. Although not deadly, the scorpions we have in Texas can inflict very painful stings, and are known to come indoors and hide under blankets or in other undesirable locations. (http://en.wikipedia.org/wiki/Striped_bark_scorpion) I had caught 3-4 in traps, but I knew there were more around the yard. I was discussing this with a friend when we recalled that scorpions glow under a blacklight. I checked the selection of UV drop-ins on Manafont and selected this module...
http://www.manafont.com/product_info.php/taiwan-3w-380nm-uv-flashlight-dropin-module-42v-max-p-5697
...because it was listed as a 380nm vs. the 395nm of the 'generic' drop-in, and had more reviews that were all positive. (The UV drop-ins on Manafont all have what appears to be the same emitter so they may be all the same except two have OP reflectors and the other two have SMO...)
I installed the drop-in using the Sky-Ray S-R5 (which I just noticed Manafont has removed from their listings). I was shocked at how 'bright' this drop-in was; using 'bright' since I don't know what other word to describe the black-lightyness of this light. A review on MF states that this drop-in only pulls 650mA, but with freshly-charged cells, I'm able to get 800-900mA at the tailcap from mine. Maybe mine is being insanely overdriven? This light shines much further than expected, but my previous UV light was 7 UV LEDs in a 3x AAA body, so no comparison. I don't have any known UV sources to compare against, but this emitter does have more visible light output than a fluorescent blacklight I have, but it makes fluorescent and GITD material shine much more brightly, and at a much larger distance.
Using this light to look for scorpions is incredible! The light illuminates the ground with a faint purple/gray light, and the scorpions fluoresce a vivid, bright, artificial-looking yellow. They are instantly noticible on the ground, where they remain still trying to rely on their natural camoflage which is very effective under normal visible light, but worthless under UV.
When I took the light outside after dark the first time, I was hoping to find a few scorpions, but totally unprepared for what I found. The first night, I caught over 20 scorpions, not counting the baby scorpions on the back of one. Over the past three nights, I have caught over 80 scorpions on my place.
These are a few I caught over the first couple of nights:
This photo was taken using a fluorescent blacklight which was causing my camera's white-balance to go nuts and completely shifting the actual color they are actually fluorescing:
I'll be manually setting the white-balance on my camera and taking it hunting with me tonight to see if I can get a good picture showing how they blend-in with their surroundings while illuminated by UV...