Lower price! 13deals.com is offering the 100 Piece - Glow in the Dark Garden Pebbles for $3.99 + $2.99 shipping. Glow-in-the-dark pebbles mark a path or highlight a flower bed! With the 100 piece set you can line a walkway edge, a flower bed, or fill a planter with these unique acrylic pebbles. After being exposed to daylight these pebbles glow in the dark! The glow lasts approximately two to three hours after full sun exposure.