The Firefly Super Kit Marker offers reliable, maintenance-free visibility in complete darkness—without relying on torches, batteries, or chemical light sticks. Built for field use and emergency scenarios, each marker contains a 3 x 2.5 mm trigalight® GTLS (Gaseous Tritium Light Source) sealed in a rugged, transparent polycarbonate housing. Visible from up to 35 metres in darkness, these markers are perfect for tagging portable gear, key locations, or safety-critical items. They’re equipped with a corrosion-resistant wire screw-clip for fast and flexible attachment to bags, boxes, tools, or stationary equipment. Key Features: Powered by tritium GTLS – no batteries or charging required Glows constantly for 10+ years with zero maintenance Visible up to 35 metres in pitch darkness Corrosion-resistant wire screw-clip for fast attachment Available in 9 glow colours for function or ID marking Impact-resistant clear polycarbonate housing Functions in extreme environments – even underwater Silent, cool-running light source – preserves night vision Use Cases: Mark tools, weapons, or storage kits for night use Identify route markers, hazards, or checkpoints Differentiation of gear or team assets by glow colour Military, survival, tactical, or camping applications How It Works: Each Super Kit Marker uses a sealed borosilicate glass vial filled with gaseous tritium. As the gas decays, it emits beta particles that safely excite a phosphor lining, creating a continuous glow—no switches, light exposure, or upkeep needed. Safe and radiation-compliant, the GTLS operates for over a decade in total darkness and all climates.