Luminous beings are we...not this crude matter...

Lume me up baby!

Last time they used radioactive stuff in the luminous materials to light up the watch dial, I heard that for Panerais in the early days using radomir the folks who applied the stuff would have nails falling off and hair falling off and God knows what else... Tritium was used for a bit as well but nowadays superluminova is the way to go. Long story short, it won't kill anyone and you won't get radiation poisoning wearing one of these babies and some of them glow real well, others not so well, and others give off a distinct and gorgeous blue hue. Luminous beings are they indeed :)

AP royal oak offshore lume

Rolex sub lume

IWC St Exupery ... it glows blue...