From sunrise to sunset, the Philips Hue White Ambiance A19 Dimmable LED Smart Bulb changes how you light your moments at home. 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. Requiring the Hue Bridge (sold separately) for the full Hue experience, this bulb fits standard-size table lamps. Install the LED light as you would install ordinary bulbs, pairing 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 smart lighting system with Hue accessories (sold separately), such as a Hue Dimmer Switch, Hue Tap, or Hue Motion Sensor. Pair it for automation with your existing Nest or Samsung SmartThings system. This box includes one Philips Hue White Ambiance A19 standard light bulb, manual, and two-year warranty.