The Nanoleaf Essentials A19 Bulb is a smart color changing LED lightbulb, and one of the first of its kind to work with Thread. This bulb proudly boasts the brightest tunable whites on the market and over 16M colors to choose from, making it perfect for all of your daily lighting needs. Whether working from home, or looking to set a relaxing nighttime ambience, the Essentials Smart Bulb provides you with the perfect light for every situation, all with the seamless and intuitive app, voice control, or the time-based automated Circadian Lighting feature.