New Hot Aquarium Glow Fluorescent Super Bright Glow-in-the-Dark Sand Particles Glow Pigment 10g ,code color #11,product no.28 Colors : code color #11. Fluorescent Super Bright Glow-in-the-Dark Sand Particles Glow Pigment this powder is "charged" with any source of light (sunlight works great) and will glow for 2-24 hours afterwards, depending on the color and charge time. Package Included: 10g of Super Bright Glow-in-the-Dark Sand Particles Delivery time: By Airmail: Generally, delivery to USA takes about 10-35 days. Delivery to Canada,AU, UK, and other European countries takes about 14-28 days.