absorbs enough strong light before being put in the darkpersonalized bracelets for girlfriend, it glows blue, green or red depending on the style of the glow power. The glow will last for hours and gradually weaken. But when reabsorbs the light , it glows again like original shows. It is the most favorable item for the night event. It looks so good in the dark reflecting the logo custom. Hope this can help you for the glow in dark silicone bracelets. Different color of the bracelet has different meanings. Band color white stand for making poverty history. Yellow stand for livestrong. Black and white stand for standing up and speaking up. Blue stand for beatting bullying. Pink stand for supporting knowledge strength. Blue and white stand for one world one cause Blue and green stand for say no to sectarianism. Most of the silione bracelets are of no meanings , people wear it just as a popular jewellery. ications will occur in the future, such as heart disease, coronary heart disease, cerebrovascular disease, retinal vascular disease, renal arteriosclerosis, limb arteriosclerosis, etc. Silicone wristband is not only used as promotional gift, but also as a medical tool. Medical id bracelets is compersonalized bracelets for girlfriendmonly used. It is a high quality silicone bracelets with the ID printed on. We can print bar code, QR code or unique serial number together with some detail of the medical institute. Usually the wristband width need at least 15mm so that the code is clear enough to be scaned. We you scan the code with a phone, the detail of patient name, disease, status will show up. It is a good help for doctor and patient to know the treatment. All the medical bracelets should made from 100% silicone which is harmless and eco friendly to avoid secondary injury to patients.