365 nM UV light 3w Ultra Violet (UV 365nM) LED Flashlight – AAA battery powered

$27.50 each inc GST

In stock (can be backordered)


365 nM UV light torch

This 3w 365 nM UV light torch (Blacklight) is powered by 4x AAA batteries. (not included  – but we recommend Alkaline for the slightly higher consistent voltage)

• Need a 5w 365 nM UV light torch then click here
• Need a 3w 395 nM UV light torch then click here
• Need a 15w 365 nM UV light torch then click here


Dog and Cat pee/urine detection at this 365nm wavelength.
Dry urine will show easily on dark surfaces, fresh urine has a bluish look.


If you want maximum effect from “black light” reactive items, 365nm is the proper wavelength for this.
365nm UV light torch will activate faint traces in fluorescent objects (without the visible purple seen in a 395 nM UV light torch – click here for that version).
Therefore our 365 nM UV light is more suited to close-up work and faint detection.


Uses for the 365 nM UV light wavelength torch:

  • urine detection
  • faint traces of fungus
  • mould detection
  • leak detection in refrigerants
  • gemstone excitation
  • portable EPROM eraser
  • detecting head lice eggs
  • forensics, criminology
  • water pollution detection
  • security inks
  • archaeology
  • chemical probe testing, chemistry
  • biology
  • money checking, credit card checking
  • food checking
  • medical applications
  • Antique glass (uranium glass, vasceline glass)
  • Forged document detection
  • A/C coolant leak detection (using dye)
  • Carpet inspection
  • Bathroom inspection
  • Arson Investigation
  • Semen
  • Hotel room inspection
  • Mineral Hunting (diamonds, etc.)
  • Salmonella and Shigella bacteria detection
  • Contaminate inspection (clean environment)
  • Drivers licence UV markings
  • Dye penetrant inspection (NDI/NDT)
  • Magnetic surface analysis


365nm wavelength LED produce a near pure UV output which is the optimum frequency for UV fluorescence.
You will see far more detail and in a greater range of colours in gemstones than any other wavelength.


365nM UV generate less unwanted “Interference Light” and they may naturally appear weaker or more white compared to the visible purple 395nM version.
This can be misleading and should not be misinterpreted.
General rule of thumb is that the more visible UV light you see the less effective it will be for detailed, faint detection work.


This is how UV (Blacklight) wavelengths usually work:

  • 230~400 nm: Optical sensors, various instrumentation
  • 240~280 nm: Disinfection, decontamination of surfaces and water (DNA absorption has a peak at 260 nm)
  • 200~400 nm: Forensic analysis, drug detection
  • 270~360 nm: Protein analysis, DNA sequencing, drug discovery
  • 280~400 nm: Medical imaging of cells
  • 300~320 nm: Light therapy in medicine
  • 300~365 nm: Curing of polymers and printer inks
  • 300~400 nm: Solid-state lighting
  • 350~370 nm: Bug zappers (flies are most attracted to light at 365 nm).



Danger !

Eye damage guaranteed from careless use. Our 365 nM UV light torch LEDs are manufactured to produce light be almost invisible to the naked eye.
It is made for a specific purpose and should not be used by children or people unauthorised by you the tradesman.
Invisible UV is particularly dangerous to the human eye because it cannot detect that damage is being done.

You may also like…