From Cool Hunting:
Mixing glow-in-the-dark particles with flooring materials, the Dutch company S. Lövenstein BV created one of those no-fuss design fixes that improves safety and convenience. The substance has limitless applications for things like signage or guide strips with the ability to be evenly and seamlessly distributed throughout a surface and masked into shapes and patterns. Integrated with contrasting colors, it serves a purpose in both light and darkness or it can be used strategically so that it only shows up when the lights are off—making it particularly useful in emergency situations. Maintenance free, it's a far superior alternative to complicated lighting systems that need energy and require wiring.