Philips Hue Phoenix Dimmable LED Smart Recessed Downlight (Opal White 4-Inch Hub Works with Alexa Apple HomeKit and Google Assistant) Works with Alexa for voice control (hub required, Alexa device and hub sold separately). Choose between millions of colors and shades of white light to light your home, wirelessly control with your smartphone or tablet and sync your light immersively to music, games, and movies. Requiring the Hue Bridge (sold separately) for the full Hue experience, this light has a special 3D texture with a hexagonal pattern that captures and reflects light, creating a dynamic effect. Easily expand your lighting system with accessories (sold separately), such as a Hue Dimmer Switch, Hue Tap, or Hue Motion Sensor. Pair it for automation with your existing Nest or SmartThings system.