Tech: 12 years of light between charges

[dracodraconis]

A company has developed a material that will glow continuously for up to 12 years without recharging. The glow is the result of beta particles released by the radioactive decomposition of tritium, which then causes phosphor-coated microspheres to fluoresce, what they refer to as betavoltaics. The material is reasonable inexpensive, flexible, and is relatively unaffected by heat, cold and pressure.