SHOP NOW! GET YOURS NOW highly visible glow in the dark safety signs to help you steer safely and clearly at night. Our glow in the dark safety warning signs are made with new high performance grade photoluminescent pigment material which require no power so they are very environmentally friendly and they will retain their light charge for a couple of hours in the dark when exposed to daylight or indoor light. The more light that is absorbed, the stronger and longer the glow will be in the dark. Other than for personal and home uses, GLOWTEN.com Safety Signs can be used in office buildings, grocery stores, hospitals, schools, factories/warehouses, traffic signage and train stations. We look forward to your industrial needs, special projects and wholesale inquiries.