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Discussion Starter #1 (Edited)
Is the luminescence of radioactive paint constant after dark? I'm not asking over years -- I know it has a half-life, so on and so forth -- but over the course of a single dark period. Another way of asking the same question: If the lume on one's watch initially glows brightly then fades after lights out, may one assume that it is a Luminova or SuperLuminova re-lume?
 

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Basically, yes.

Tritium vials (about all you will find new these days) will glow slightly brighter, as the phosphors will absorb ambient light as well as the energy from the radioactive source. This is largely offset by your eyes not being dark adapted.

 
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