Photoluminescent powder from rare earth, which absorbs ultraviolet, lamplight, sunlight and other visible lights for only 15 minutes, then give out lights for above 12 hours . Average use time is above 20 years due to stable physical character, it has no radio active, no heavy metals or dangerous chemicals.
　　It replace the new material of luminous body with radioactive material. Its use is very extensive,uses contian coating , printing , decorating , clothing , plastic trade,.
photoluminescent powder can be used as additive into all kinds of materials including paint, ink, resin rubber, glass etc, which can be used in architecture, military industry, transportation and so on.