It's radioactive, right? I expect they are safe, but what if you're wearing multiple things on you every day? Let's say you have a watch, a bracelet and a pendant, may it affect your health in the long run?
Hi Stargazer.
They are safe, as they are all encased in the glass tubes. In case even the tube is broken, for example, the tritium gas easily dissipate into the atmosphere.
Even you wear the tritium watch, wear a pendant or ear rings with tritium, they won't cause any effect in the long run. But if you are talking about direct exposure to the radiation in a huge quantity, then you will have to be careful.
Even the radiation therapy in the Hospital has much higher exposure compare to wearable pieces with small doses of tritium.