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During the powder off, we always want to find illuminant device as soon as possible. But it is really danger, since we may get harm in the dark. Torchlight is a design that combines to light switch. It will shine weekly in normal day. Once the power went off, Torchlight will shine strongly. It is not only allowed you to identify the position in the dark, but also able to use as a illuminant device.
Chieh- Chun Huang,