Quote:
Originally Posted by rburg
If the sights stopped glowing after 3 or 5 years, its not them going out/the tritium decaying. It breaks down at a very predictable rate, 12 or 13 years you have half as much, so in theory, it will be half as bright as it was 12 or 13 years ago. That doesn't mean you can't see or use them. My experience was they were really bright when new (Trijicon). Even at half the brightness, they'd still probably light the room. And its a gradual decline, not all at once.
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Dick, I understand the halflife of tritium. I think the "useful life" may have just as much to do with the quality of the tubes containing the tritium. I chalked the first early failure of the PTs up to the possibility that the gunsmith who installed them used too much force and cracked the vials. The second set of vials were installed by the factory, so I think the materials themselves were at fault.