Shandong Liaoyuan's photoluminescent safety signs have some unique features.No power is required, Indication lines can be continued,the signs can be installed at floor level,installation is easy,and the product offers 100% reliability.In contrast to electronic safety signs, photoluminescent signs are energy saving,environmentally friendly and widely applicable.They are recommended by Fire Services Department in many countries,and widely adopted in fire safety,evacuative and transportation fields.