FIREFLY TRITIUM SUPER KIT MARKER (MINT) - S$25
It's green color and the brightest one. Just bought to see how it works. Text me at Eight4781164 if you are interested.

Zip markers allow tent and bag zips to be seen, located and operated in darkness, enabling immediate exit without using electric torches or chemical light sources.
Simple, reliable and very effective, these markers enhance operational efficiency and safety in dark and low light conditions.
These zip pull markers remain continuously illuminated for more than 10 years even during prolonged periods of complete darkness.
No battery, switch, recharging or spare parts are required.
Light is provided by a GTLS (Gaseous Tritium Light Source) that provides a safe, reliable and self-powered source of light.
Suitable for operation from -40'C to 70'C, they will continue to work normally, even when used or immersed in water.
Sealed (non-emissive) GTLS Max Activity