Glow Ring

The glow ring that I ordered from Britain arrived today, in three colours Green, Pink and Blue. I think the green on is the brightest of all. It contain a small amount of Gaseous Tritium Light Source (GTLS) which is slightly radioactive and had the half life of 12 years, so it will lost half it’s glow in about 12 years.
Not as bright as I expected though.

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