How long will luminous luminous powder last?

Many customers ask why the luminous powder is not “bright at all.” After an hour after excitement, the brightness seems to lapse after the brightness. It is inevitable that we will attract people and they will make a misconception unnecessary. Then how long can the luminous powder come from? ?

1. Firstly, we must be clear that luminous powder is a weak light source, rather than a “light source” in the normal sense. It is a self-illuminated material, and we can not make it as bright as a candle or even light. Physically, after absorbing light energy, it is stored in the powder lattice, and the limited light energy stored slowly in light is released. Energy cannot be released more than the stored light energy.

2. Secondly, since the luminous powder emits the light energy stored, the brightness must be gradually weakened after the light source is expected to stop, because energy is t eat her. However, the brightness of the powder goes luminous quickly in the dark for 1 hour, and the brightness goes slowly after 1 hour and we feel "without burning" after seeing the luminous powder glow for about hours, the first time really. The brightness says too fast, and the contrast is obvious.

3, we did a systematic experiment: at 11 o'clock in the evening, the night light powder is absorbed for 15 minutes, placed on the bed, the curtains are tightened to avoid the incoming sun, and the alarm clock is made. adjust the brightness of the luminous powder at 5 o'clock the following day. Sure enough, the next day, my eyes opened and I found the luminous powder that was shining at first glance, because it was very conspicuous, and at this time the luminous powder was shining on for 8 hours. Therefore, at night, we brightness of luminous materials can feel easier than we just focused, because our eyes were adapted to the environment darker at night, so the luminous powder widely used widely in field identification signs and power switch signals. When the room is dark, people can find the switch to turn the light through the low light sign on the light switch.