keep the light's on for 8 hours when power is lost

Quote:

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keep the light's on for 8 hours when power is lost

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Above quote comes from running bull


Is there a device on the market that can do this locally and via a App? Would it also have a Motion detector?

Imagine being able to control this when power is out and it can be done locally and also away from the house via an App on a Smartphone.

Remember, this would be used when the power is out. Devices currently do this when the power is on.