** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** The Meprolight FRBS 4D pairs the ...

Glow-in-the-dark projects aren’t that uncommon. You can even get glow-in-the-dark PLA filament. However, those common glowing items require a charge from light, and the glow fades very quickly.

InnovoDesign an Etsy shop is selling a 3D printed metal keyring that is equipped with radioactive Tritium and will provide a useful glow for up to 20 years. Allowing you to easily see where you have ...

Developed by a Caltech team led by graduate student Colin Cook, they incorporate tiny vials of tritium, the same radioactive (but apparently safe) form of hydrogen gas used in glow-in-dark wristwatch ...