Please put the necklace where the sun shines or UV light exposure continues for 5-10 minutes. Then get a dark place, can shine!

Light will slowly go dark, not night lit. And so it does not light up, then get on down the sun or light exposure, then it will continue to glow! It can be used repeatedly. Purple needs sunlight to shine more easily.

Material: Glass

Pendant size:7*28mm
Chain Length:45cm+5cm(1 inch=2.54 cm)