Luminescent glow stick principle: noctilucent stick the main raw material is light to energy storage luminous powder (not radioactive) optical storage luminous powder is phosphor under natural light solar lights such as ultraviolet irradiation the light energy stored after the stop light in slowly released in the form of fluorescence so at night or dark place still can see light duration lasted for several hours to ten hours. So try to make it after you receive the kiss the dew outside absorb light oh don't have a cover. To light only after a luminous absorb more light the longer the time oh come with double-sided adhesive using only a cut into small pieces and double-sided adhesive to stick on the wall night can see this luminous stick light emitted by the light. Lighting fluorescence at night makes your room romantic warm and sweet