✜Banggood deals≫ NC TUP ⚡Rofis TC1⚡$23.06⚡S41S ★★★ $34.65 BLF GT mini ★ ⚡ Fitorch P25 QUAD LED 26350⚡X1R angle light ★BLF GT70★

BLACKWATER KR36 Titanium Alloy Tritium Vials Light Self-luminous 25Years for VIP2 and above is for $36.95 (instead of $49.95) and using BG points it’s possible to lower the price further to:

VIP2

VIP3

VIP4

VIP5

$31.04

$30.67

$30.30

$29.56

This keyfob doesn’t need light exposition to glow at night - it uses gaseous tritium (isotope of hydrogen) in a process called radioluminescence and lasts ~25 years (due to radioactive decay of tritium it looses half intensity in about 12 years - it doesn’t stop emitting light abruptly like discharged flashlight - instead it gradually glows dimmer and dimmer).
Here’s article about how this works: wikipedia: Tritium illumination.