I was looking into the luminox..

it's NOT cheap and the reason why it has a glow is because they have some type of chemical " (tritium) and it gives off a steady stream of electrons due to beta decay. These particles excite the phosphor, causing it to emit a low, steady glow. "
they say it will only last for 25 yrs... so it'll be like 20 years... i really want to see one in person.