LED Ultraviolet Flashlight

These small ultraviolet flashlights are very convenient for identifying rocks, hunting for scorpions, or just trying to find where your dog or cat peed in the house.

Longwave UV (UVA)
Wavelength: 315–400nm
Photon energy: 3.1–3.94 eV

Runs on 3 AAA batteries (not included).

Learn more about the science of ultraviolet light, and many more interesting colors, in our  book The Universe in 100 Colors.