This Philips Hue White and color ambiance A21 E26 LED smart bulb 4-pack offers millions of shades of warm-to-cool white and color changing light to transform your home decor and the way you feel. These 100W equivalent smart RGB lights feature Bluetooth capability for instant light control in one room. Bluetooth makes it easy to get started with Philips Hue. Simply screw in the bulbs download the Hue app and start enjoying the convenience of smart lighting immediately. They can dim, brighten, and set the mood right out of the box. With Bluetooth you can control up to 10 lights in a single room. It's easy to have the right light for routines throughout the day with Hue light scenes. Or create the ultimate mood lighting with dynamic light effects that show subtle changes in color or brightness that you can customize in the app. Looking for smart bulbs that work with Alexa and Google Assistant? It's easy to set up voice control with the Hue app and use simple voice commands to control your lights. Whether you need smart LED lights for bedrooms, your living room, or even kids rooms, Hue complements your room decor while offering the convenience of smart control. Already have a Bridge or want to get more from your Hue system? Connect them to a Hue Bridge (sold separately) to unlock the full power of Philips Hue, including the ability to control up to 50 lights and accessories, automations, and smart control from anywhere in the world.