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Most lights today are controlled by their switches, which deviate away from the original significance of the invention of friction fire.This product means to inherit the thought and method of ancient people getting brightness and use it into modern product, reminding people of the basic rules of the nature.The product is implanted a special sensor, which recognize this gesture and memorize the gesture before the implantation. When you obey the rule that you need a strike to ignite the light., the light will turn on lightly.