The Vidrepur Glow in the Dark Fireglass Collection is a glass mosaic that glows after dark. Make your installation come alive with this unique glass tile. Just leave in the light a few minutes then turn off the lights to see the glow. Glow time of six hours. Vidrepur glass is 100% green and recycled. This tile is the perfect choice for your swimming pool and spa and home interior and exterior, wet or dry installations, including kitchen backsplashes, shower walls and residential floors (not slip resistant). Glows Intense Bluegreen.