Photo-luminescent pigment is a new type of environment friendly pigment with the characters of non-toxic innocuous non-radioactive; By absorbing ultraviolet light and other visible light for 10~20 min it can release the energy in the form of visible light for about 10 hours in the dark and features duty-cycle operation.3 years storage: after using remember cover cap lid place the shade can be placed in the next 15 months. Usage: Painting graffiti decoration color noctilucent using range: paper ceramic gypsum walls wood glass plastic clothing lamps and lanterns or surface vessels.