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At night, when light is off, the crescent region on switch is automatic lighted up, It seems a warm rising crescent in the dark room. It not only help people find the switch but also like Luna company you during the long night.
Xiaowei Wu，Caixiang Ding，Rufeng Dai，Ziyun Yan，Dunqi Lu，Wenjie Zhang，Dawei Pan，Huanghao Jin，Qionglei Zhu