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Firefly Tritium Item Identification Kit Markers

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Product Description

Firefly Tritium Item Identification Markers  O O  


GTLS  (Gaseous Tritium Light Sources)


  • Firefly kit markers allow vital equipment or positions to be marked covertly in darkness, yet enable the user to locate them at close quarters without resorting to electric torches or chemical lights.
  • Simple, reliable and very effective, these markers enhance operational efficiency and safety in dark & low light conditions.
  • These kit markers remain continuously illuminated for more than 10 years even during prolonged periods of complete darkness.
  • No battery, switch, recharging or spare parts are required.
  • Light is provided by a GTLS (Gaseous Tritium Light Source) that provides a safe, reliable and self-powered source of light.
  • Suitable for operation from -40'C to 80'C, they will continue to work normally, even when used or immersed in water.
  • ‘Cold’ light preserves user’s night-sight.
  • Colour options for differentiation of purposes.
  • Limited output for secure viewing range.
  • Wire screw-clip for fast, flexible attachment.
  • Sealed (non-emissive) GTLS Max Activity <3.3GBq

Features and FAQs:

Firefly GTLS Gaseous Tritium Light Source markers:

  • NOT a chemical luminescent product (i.e. not a chemical light stick).
  • NOT a photo luminescent product (i.e. does not require light to recharge).
  • NOT a electroluminescent product (i.e. no batteries required).
  • Is a Radiological luminescent item (also known as Tritium or 3H or GTLS).
  • This same illumination method is commonly used in emergency exit signs.
  • Does NOT need recharging ever! There is nothing else like it.
  • Is not a Torch it’s a marker, it’s always on, but only visible in low light or darkness.


  • Total Length: 30mm
  • Width:  9mm
  • Choose:  Green, Blue or Red




ONLY for export out of Australia if you have the applicable permit from your customs / border protection department.
Please supply a copy of your permit via email or fax before ordering these items - Thank You


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