Outdoor light motion sensors can add a healthy level of security to your home. Here's how to set them up.

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There's really not much to the motion sensor. The sensor shoots out an invisible light field that spans 100 degrees horizontally and 100 degrees vertically. Its blind spot is 180-degrees to its sides.

Philips uses the ambient light sensor too: you can set it so the lights won't come on if it's already bright, for instance, and the daylight sensitivity is adjustable.

HomeKit motion sensors are a vital accessory when building a smart home than runs by itself without manually turning devices on and off.