VT-Metal-VT said:
Why is illegal to have a glow ring in the US ?
There are two schools of thought:
(1) Tritium could theoretically be used to create a nuclear weapon
(2) Vast quantities of frivolous, recreational Traser rings would accumulate and be a disposal problem, like discarded TV sets but worse.
#1 cannot possibly be correct, because:
(a) You don't need tritium to make a fission bomb (it's used for H bombs). H bombs require a fission bomb to trigger them, so no terrorist would ever make one.
(b) Any hostile group wanting tritium could just buy Traser rings on eBay, have a friend in UK get them, or get the many legal tritium sources in the US -- gun sights, exit signs, watch dials, etc.
Therefore it seems more plausible the US simply wants to limit the disposal problem. Whether such a problem would exist considering the UK handles it OK is another debate.