Frustration Free Set-up with Alexa Echo devices Sengled Bluetooth bulbs can be discovered right after you power on. Expand your smart home without overcrowding Wi-Fi network or adding an extra hub the Bluetooth Mesh technology allows you to do whole house installation. Use Alexa app or voice control to setup routines schedules and away mode. Vibrant color (CRI 90) Ample brightness (800 lumens).