Philips Hue GU10 Light Bulb (Old Model 1st Generation) Single 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 Philips Hue Bridge (sold separately) for the full Hue experience, this GU10 LED smart spot light is designed to fit track lighting and chandeliers. Install the LED light as you would install ordinary bulbs and pair them with the Hue Bridge, which allows you to control smart-bulb-equipped lights via the Philips Hue App. 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.