The bag that you just received won't shine, because the bag has spent a long time in the dark and no energy.

If you want to emit light, you need to absorb light first, such as sunlight, flashlight or fluorescent light. 

The stronger the light absorbed, the brighter the light.

Luminous luminescence is continuously illuminated from light to dark and can be recycled.

In daylight, the pattern is the same as when it is carried during the day, 

and in the dark night scene, the effect of the night light can be presented.

Tips: The longer the night light pattern is illuminated by the light source,

 the greater the intensity of the light source and the brighter the light in the dark.

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