AGT™ Glowing Mini Pebbles (GMP) are photoluminescent aggregates that add a distinctive glow to pool finishes, concrete, and decorative surfaces. Available in 1/8" and 1/4" sizes and Emerald Yellow, Aqua Blue, and Sky Blue colours, they absorb natural or artificial light and can be charged with UV light for a brighter glow. They can also be recharged throughout the night using a UV light or suitable underwater UV pool lights. Glow gradually fades after charging, with visibility influenced by colour, aggregate quantity, surface exposure, and surrounding lighting.