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With the change in light intensity, the glass will change color. If the light be stronger , the glass color will deepen.On the contrary,the glass color will shallow.Meanwhile, it can be of different colors according to the changing scene .
By changing the color and deepen, making the light becomes soft, so you can effectively prevent light reflection on the human eye damage.
Zhu Hejun,Zhou leijing,Wu Shuangying,Li Dandan