How long does the powder glow?
The amount of glow depends upon your perception of the glow. The powder will glow for 14 hours, but how well you see the glow depends upon a number of factors. If there is ambient light, your eyes will have a tendency to adjust for that ambient light. If your eyes are not well adjusted to the dark, you may have trouble seeing the glow. If I get up in the middle of the night and walk into a dark room with the powder, I will see it very well. If I come from outside on a sunny day and walk into the same room, I will not see the glow until my eyes adjust to the darkness.
