The Spark - Tritium Glow Fob

The Spark is a green tritium glow fob—a compact marker light designed to make your keys and gear easier to spot in low light. It’s the slightly smaller version of the Ember Glow Fob, offering the same always-ready glow in a smaller format. Attach it to your your KeyBar or the zipper on a backpack, range bag, tent, or sleeping bag for dependable visibility where you need it most.

Tritium is self-powered, so it glows without sunlight, batteries, or any outside charge, and its 12.23-year half-life means long-lasting performance over time. The Spark features an injection molded polycarbonate casing, glass breaker tip, keychain hole / lanyard loop, and includes one cylindrical tritium lamp with keyring. It measures 0.825" long (excluding keyring) and 0.31” in diameter.