Set indoor lights on automatic timers, preferably with a random schedule.

为室内灯光设定自动定时，最好设定不规则的时间。

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Six months later the image still sears Brown's mind, but he conjures up another one: an even more crippling new wave of attacks that might come next, puncturing the U.S.' technology underbelly and disabling the networks that keep nuclear missiles in their silos, the lights on in hospitals and automatic teller machines belching out cash.

FORBES: Scare Tactics