Philips Hue White Ambiance Smart Bulb Starter Kit (2 A19 Bulbs  1 Hub and 1 Dimmer Switch  Works with Alexa  Apple HomeKit  and Google Assistant) Works with Alexa for voice control (hub required and included, Alexa device sold separately). With wireless control on your smartphone or tablet, choose the perfect light setting for any mood or activity such as reading or relaxing, concentrating, or energizing. Connect the Hue Bridge with two bulbs that fit standard-size table lamps and a dimmer to control the light intensity. Grow your system with support for up to 50 lights. 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 lamps and overhead lights via the Philips Hue App. Easily expand your lighting system with up to 12 accessories per system (sold separately), such as a Hue Tap or Hue Motion Sensor. Pair it for automation with your existing Nest or SmartThings system.