These are 5 mm Ultraviolet LEDs with a voltage drop of 3V - 3.6V.
UV LEDs can be used in a variety of applications - PCB fabrication, counterfeit detection of currency note, documents, in sterilization, pesticides, etc.
These LEDs emit UV rays of wavelength 360-400nm. The UV rays in this wavelength do not harm the eyes, but it is always safe to use eye protection when using these LEDs.Just do not look straight into these LEDs for a very long time.
