Place the aggregates under any light inside your home or office for five minutes or under any UV light source for one minute. Then place the aggregates in a room that will receive minimum light when the room lights are off such as a closet or bathroom. Return to the aggregates periodically over the next several hours and you will see that, although the glow decreases significantly, they are still glowing and will continue to noticeably glow up to 12 hours.*
* Glow colors vary in glow longevity once charged to 100%. Firefly (+/- 12 hours), Aqua (+/- 10 hours), Glacier (+/- 8 hours).