AGT Aqua Blue Glow Disc with centre hole. This NEW decorative product was specially designed to act as passive lighting requiring no electricity.These glow-in-the-dark discs increase safety in low-light areas and after only 10 minutes of sunlight will glow for over 15 hours! They can be easily affixed to ANY surface using a screw or nail. They can used on pool decks, wood decks, stair treads, walkways etc.