The Glow Gel Phone Case glows up to 12 hours after brief exposure to any light source. This means you can always locate your phone in purses, backpacks, or any dark situation. Developed under the guidance of a rocket scientist who worked on the historic Apollo missions to the moon, patented Glow Gel technology captures and retains light better than any other glow material to produce unmatched glow times. More than just a radiant case, Glow Gel offers extreme 360° protection. It's stylish and rugged!