Any smart floodlight will have a motion detector that will turn on its light when someone enters its detection zone. What makes the Philips Hue Outdoor Motion Sensor special is that it can trigger multiple Philips Hue smart bulbs and smart luminaires. And those lights can be both outside and inside your home.
When a burglar trips a floodlight, they just might shrug, duck out of the pool of light, and proceed to break into your home, thinking “Eh, it’s just a dumb floodlight.” But an intruder might think twice if they also see a light flip on inside your home. The last thing the typical thief wants to do is break in while someone’s home.