Tritium is a gaseous radioactive isotope of hydrogen. When tritium-emitted electrons interact with a phosphor material, fluorescent light is created. This process is called radioluminiscence.

Because tritium light does not need of any electric power, it has been used for a long time in different fields, mainly emergency exit signs or wristwatches, but its field of applications can still be expanded.

Tritium2 Tritium