Tritium Glow Lights

Tritium is a radioactive isotope of hydrogen, with a nucleus containing two neutrons that are not usually present in hydrogen atoms. Naturally occurring tritium is extremely rare on Earth. Tritium glow lights are made using small amounts of tritium in combination with a phosphor material. The tritium emits electrons through beta-decay, which excite the phosphor and cause it to emit visible light. This tritium glow light here will illuminate for ten years and can be seen from up to 30 feet away. Its marketed use is as a ‘self-illuminating safety device’ for identifying a location in hours of darkness.