Glow powder can be automatically glow material in the dark, the main component is rare earth, belongs to the inorganic materials. glow powder first absorb all kinds of light and heat, converted into light energy storage, and then in the dark automatically glow, by absorbing all kinds of visible light to achieve the glow function, and can be used for an unlimited number of cycles, especially for 450 nanometers below the short-wave visible light, sunlight and ultraviolet light (UV light) has a very strong absorption capacity.

There are mainly 3 categories of phosphors for lamps. The first category is used for ordinary fluorescent lamps and low-pressure mercury lamps, the second category is used for high-pressure mercury lamps and self-ballasted fluorescent lamps, and the third category is used for ultraviolet light sources, etc. There are many types of phosphors, and the price is different, phosphors have good thermal stability, safety and environmental protection, for a variety of white light, can be adjusted to different red, blue, yellow and so on the color.