notes: If you find it is not bright, please use strong light such as flashlight, sunlight. about: Luminous products are the ones that absorb the best UV rays, and are absorbed in dim light during the day, and so on over and over again. Please receive the goods after absorbing the light in the sun, and then you can see the light in the dark. It only fades because the goods absorb less than a few days of light in transit when the express package is in transit. 1. Put it in the sun during the day or outdoors where there is ultraviolet light and dark light. The intensity and duration of light varies according to the brightness of the light, and about 30 minutes after irradiation can make our eyes bright for several hours. 2. When there is no ultraviolet light at night, the light can be irradiated with absorbance, without deliberately basking in the sun, as long as it is exposed to light, the darkness will start to glow. feature: 100% Brand New High QualityVintage Women's Luminous Beads Hollow Round Pendant Glow In Dark Locket NecklaceBeautiful and charming. This is a great gift for loved ones, family, friends and colleagues. Environmentally friendly alloy pendant, Metal Color: BronzeLuminous color: green or blueMaterial: Aluminum alloy. Available colors: blue or green. SpecificationName: Glow in the Dark Luminous Pendant NecklacePearl River Delta#: 1648-1649#No. H116N#Weight: Approx. 30 gramsPacking: Simple OPP bag Age Group: Girls, Ladies, Color: blue, green. Condition: newdisplay_type:Jewelry Hollow Round Glow In The Dark Locket Pendant NecklaceFeatures: Glow in the dark luminous pendant necklacefocus_type: jewelry, necklace, pendant, round, fashion, loveFunction: glow in the dark glow pendant necklaceType: fashion, luxury, beauty, Height: Approx. 2.5 cmLength: about Chain: 45cm Pendant: 2. 5cmmade in ChinaMaterial: aluminum alloymegapixelModel 156B-2-5#Occasion gifts, birthdays, festivals, weddings, lovers, girlfriends, etc. operating systemCD-ROMPattern: roundproduct_type: Jewelry Neckless Silver Garnet PendantSize: Approx. Chain: 45cm Pendant: 2. 5cmStyle: Jewelry, Necklace, Pendant, Heart, Fashion, Love, Lover, Girlfriend,