< table border =" 0" cellpadding =" 0" cellspacing =" 0" width =" 461" style="size: 346pt;" >< td elevation="20" course =" xl64" width =" 461" style =" elevation:15.0 pt; size:346 pt" > Safe & Resilient- These glow-in-the-dark rocks are constructed from luminescent powder as well as all-natural material, safe, non-radioactive as well as odorless. Radiances for as much as 2 hours after a full day in the sunlight. Usage for home window planters as well as fun ideas for home design. Commonly Used - These Fish tank Rocks are excellent for indoor as well as outdoor design: You can pave these beautiful stones on the sidewalk, path or driveway, edge a blossom bed or fill potted plants, DIY embellishing vases, fish containers, fish tank ornaments, ponds, yard as well as swimming pool. How it glows - These glow-in-the-dark fish tank design rocks soak up as well as store power from sunlight