Glow stones also known as photo-luminescent aggregate were first introduced to the concrete industry in 2008 by Ambient Glow Technology – AGTand have since gained global notoriety due to their magical glowing qualities. Unlike shimmering, Mica-laden or fiber optic embedded concrete, glow in the dark stones ‘self-power’. They absorb UV spectrum light and store it until the charging source is no longer present and then begin to give off their energy in the form of ambient light. This maintenance-free, charging and discharging process will continue indefinitely allowing concrete and asphalt surfaces to luminesce for many years to come.