51 LED Ultraviolet Light with Metal Body Powerful UV Flashlight for Urine Detection
The best investment you'll ever make!
Carpet cleaners know that real gold is yellow and found in carpets, not caves. This high-powered, 51 LED UV light is built specifically for urine detection and will have you screaming "Eureka" all throughout your customer's house.
The LEDs emit at 395nm, in the UV-A band that makes the salts left behind by dried urine fluoresce. It is the standard wavelength for multi-LED torches of this type, and it does the job it is bought for: finding and confirming contamination in a darkened room.
What 395nm means in practice. 395nm sits close to the edge of visible light, so part of what the torch emits is visible purple. That purple competes with the fluorescence you are looking for, which is why this light needs a properly darkened room to work well. A 365nm lamp emits far less visible light and gives better contrast, including in ordinary room lighting, but costs considerably more. For spot checks, quoting visits and confirming a specific area, this torch is the practical choice to keep in the van.
Durable is an understatement for this light. The UV light is water-resistant and shockproof and the rugged aluminium body will protect your light from mishaps in the van. LED lifetime is an impressive 100,000 hours and will run for hours on three AA batteries. *Batteries are not included*
Don't get stuck with a dead light! Rechargeable lights can provide unpleasant surprises when you show up at a customer's house and discover your battery is dead. Keep a spare set of batteries handy and you'll never be without your gold detector.
Amber glasses are highly recommended for detecting urine. These glasses are inexpensive and will greatly improve the contrast of any urine stain - a must with any UV flashlight.
The graph below compares two UV lights. Wavelengths below roughly 400nm are ultraviolet; above that you are into visible violet light, which does not create fluorescence. A more focused light, represented by the red line has a high level of intensity in the optimal range and will fluoresce urine more brightly. A typical UV light using older technology, represented by the green line, has a broader range of electromagnetic radiation and will generally not work as well in daylight conditions. When testing a light, make sure to judge it by how well it fluoresces the desired material, not by how much visible (purple) light is seen, as purple light is just wasted energy. A simple, and sometimes scary, way to check the effectiveness of light is to find the nearest restroom and test it with the light on and off.
For how to inspect a room properly and what else fluoresces under UV, see our guide to finding pet urine with an ultra violet light.
