Live~NRGY

https://en.wikipedia.org/wiki/Tritium_illumination

…”Legislation

Because tritium in particular is an integral part of certain thermonuclear devices (though in quantities several thousand times larger than that in a keychain), consumer and safety devices containing tritium for use in the United States are subject to certain possession, resale, disposal, and use restrictions. In the US, devices such as self-luminous exit signs, gauges, wrist watches, etc. that contain small amounts of tritium are under the jurisdiction of the Nuclear Regulatory Commission, and are subject to possession, distribution, and import and export regulations found in 10 CFR Parts, 30, 32, and 110. They are also subject to regulations for possession, use and disposal in certain states. Luminous products containing quantities of tritium greater than that which is used for a wrist watch are not widely available at retail outlets in the United States.[citation needed]

They are readily sold and used in the US and are widely available in the UK and are regulated in England and Wales by environmental health departments of local councils. Tritium lighting is legal in most of Asia and Australia.[citation needed]”…

Watch out(no pun intended on such a hilariously serious subject). I can just see all the EXIT SIGNS now – sorry, due to circumstances beyond our control, you’ll have to make your way out to street level without the use of our stolen EXIT SIGNS.

“Watch out” means the new it’s become a dinosaur in the iphone watch business of progress.

Shouldn’t those EXIT SIGNS carry a RADIOACTIVE WARNING SIGN README LABEL ON THEM BTW ???