This is a bit misleading. I have several photos of my >2 years old tritium/phosphate activated accessories taken in twilight hours, or just after that, in which the luminescence is very clearly separate from any background light.(and directly analagous to the brightness level in real life. )
Perhaps you've seen in real life some that are much older/decayed? I have a bunch that I need to replace in sights/flashights due to this reason, they're just much dimmer than originally advertised.
(anyways, these flowers aren't phosphorous tubes excited by radioactive decay/emission so there's no way they will be as full spectrum'd/constant as the tritium vials I just described.)
Perhaps you've seen in real life some that are much older/decayed? I have a bunch that I need to replace in sights/flashights due to this reason, they're just much dimmer than originally advertised.
(anyways, these flowers aren't phosphorous tubes excited by radioactive decay/emission so there's no way they will be as full spectrum'd/constant as the tritium vials I just described.)