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In an accidental discovery, an abandoned bamboo tube caught my attention. The bamboo section was in a quarter of the entire bamboo tube with a hole pierced in the middle. I used this natural structure on the flashlight, the hole was used as the layer of the lamp bead, and the natural bamboo added a temperature to the cold flashlight. This program has two versions, one is the universal outer switch, the wall is transparent, the illumination range is increased, and the switch is turned to the other night is the night light. The battery will provide 20 hours of illumination, care for both eyes, and second, lightly press the bottom light source.