Glow in The Dark Rocks for Garden, Colorful Outdoor Landscape Stones - Luminous Pebbles & Glowing Stones for Night Pathway, Walkway, Driveway, Fish Tank, Aquarium Decor

I thought the stones would be like four times bigger than they are way too small. I ended up putting them in my windowsill, two windowsills, in the sunlight, however, they never did glow never did change color only stayed in the color that they came. The reason I put them in the window seal was to get the sun at least but, Never ever, never ever, change color at all. They stayed in the color they came in and never went up or down. They just stayed that color. A great big disappointment.

stones don't glow after sitting in full sun light all day