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Old 07-20-2009, 01:47 PM
Nygma Nygma is offline
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Meprolight says 'up to 15 years'.

Meprolight, Military Tritium Self Illuminated Sights by Meprolight, Tritium

I read somewhere that tritium sights are half as bright as new after twelve years.

P.S.
Here it where I saw it:
http://en.wikipedia.org/wiki/Tritium
Half the remaining tritium in the sight will decay every twelve years.

Last edited by Nygma; 07-20-2009 at 02:01 PM.
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