What's Required? Nothing! - This bulb works straight out of the box, simply screw in your new bulb and set it up using Bluetooth. You can, however, add a Hue Bridge (sold separately) to your smart lights to experience the full suite of Philips Hue features. With a Hue Bridge, you can add up to 50 smart lights to control throughout your home. Create routines to automate your entire smart home lighting set-up. Control your lights while away from home or add accessories such as motion sensors and smart switches.