In the hopes of one day lighting highways without the need of electricity, a Mexican researcher has developed a unique formula of concrete that would not only glow in the dark, but last for a century.

According to a report from Phys.org (via Investigatión y Desarrollo), Dr. José Carlos Rubio of the University of San Nicolas Hidalgo in Michoacan, has modified “the micro-structure of the cement,” allowing the concrete to “absorb solar energy” and re-emit it as light. “The main issue was that cement is an opaque body that doesn’t allow the pass of light to its interior,” Rubio explained to Investigatión y Desarrollo. He says this is caused by the crystal flakes that form when cement dissolves in water and begins to become a gel.

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