Steampunk fairy necklace Blue glow in the dark silver wings by Umbrellalaboratory Fairy Blue glow necklace Pendant is roughly 1-1/4" x 1-1/2", necklace is 18" long Made by UmbrellaLaboratory in the USA Any light will charge the powder. However, direct sunlight, high wattage bulbs, or black lights are needed to obtain the maximum glow. The glow will gradually fade until recharged. It can be recharged over and over.