The Firefly Bivvy Marker is a compact, self-luminous tag designed to make tent zippers, bags, and gear instantly visible in the dark. Powered by a built-in trigalight® GTLS (Gaseous Tritium Light Source), it glows continuously for over 10 years—no batteries, charging, or ambient light needed. Perfect for bivvy bags, tents, rucksacks, or tactical loadouts, the marker allows instant location and operation of zips or gear without using torches or chemical glow sticks. Its low light output preserves night vision and is ideal for both general use and covert operations. Key Features: Self-powered tritium light – always glowing, 10+ year lifespan No batteries, no charging, no maintenance Visible up to 10 metres in complete darkness Includes stainless steel split-ring for easy attachment Available in 9 glow colours for colour-coding or identification Manufactured to UK MOD Defence Standard 62/4 Functions in all weather, underwater, and extreme temperatures Safe sealed-source lighting – non-toxic and non-electrical Applications: Mark tent or bivvy zippers for night use Tag rucksacks, bags, or emergency kits Covert or low-light location marking Gear ID during night ops or camping How It Works: Each marker contains a 1.5 x 6 mm trigalight® GTLS vial housed in a clear, impact-resistant polycarbonate body. The tritium gas inside emits low-energy beta particles that excite a phosphor lining, producing a visible glow—safe, reliable, and constant. No switches or moving parts are needed, and it operates flawlessly in temperatures from -40°C to +80°C, including in Zone 0 hazardous areas.
