The Philips Hue White & Colour Ambiance Smart LED Bulb works straight out the box - simply fit your bulb and use the Philips Hue Bluetooth app for easy control.Play around with 16 million colours, including warm-to-cool white light to set the mood for your room. Choose a cool white for study time or a warm, relaxing colour for movie nights.Control your light without reaching for your phone. With an Amazon Alexa or Google Assistant device, you can use simple voice commands such as, 'Alexa, dim the lights' or 'Hey Google, turn on the table lamp', to control your lights.Ready to expand your options? Unlock the full potential of your smart lighting any time with a Hue Bridge (sold separately). You'll be able to add more lights, control your lighting away from home, set schedules, and sync your lighting with music, movies, and games.