MacRumors posted a review on the Weatherproof Hue Outdoor Motion Sensor
A quote from the article:
The Philips Hue line of lights have been controllable via an indoor motion sensor for some time, but Signify is today introducing an Outdoor Motion Sensor that's designed to control the range of outdoor Hue lights that are now available for purchase.Weatherproof Hue Outdoor Motion Sensor Review
The Outdoor Motion Sensor works just like the indoor Smart Motion Sensor, automating your lights and other HomeKit products to come on when motion is detected and turn off when there's no motion detected, all on an automatic basis.
As with all Hue products, the Outdoor Motion Sensor is designed to work with a hub, so a Hue hub and Hue lights are required to use the product, even though it can interface with other HomeKit devices.