Andre luminous introduction - luminous emission process: the light absorbance at - Storage - dark light. A short-acting luminous powder luminous powder that ZnS: Features "comes and goes fast," so-called "faster" refers to the short absorption time (within one minute) and is sensitive to light (low light performance will, of course, glare would be better); "go" is the luminous short time (1 hour). 2, long-lasting luminous powder: Features "slower, go too slow", so-called "slower" refers to the length (need 5-10 minutes, then longer is better) time and require light absorption; "go too slow "refers to a long light emission time (usually at least 6-12 hours). According to the appearance of color, light color, brightness, luminous time, particle size, etc. There are a lot of grading, classification. An absorbance: luminous absorb visible light in the light, the light, the stronger the better, followed by ultraviolet light efficiency, sunlight, incandescent light, yellow light; 3, accumulators: luminous powder will absorb the light energy stored in the Powder by luminous unique function, and then light energy released. But here to note that this process is different from the accumulator battery, battery energy is released when it is used, while absorbing light luminous - the storage - emitting processes are carried out simultaneously, wherein the light emitting process lag and lengthened, luminous in the dark time of up to ten hours; 4, light: the higher the initial brightness gradually decay until dark. Beginning ten minutes, brightness decay rapidly, after the decay rate slowed. Luminous efficiency of the points are the length (the length of the luminous time)