Any light fixture can become a showpiece in your home with the Philips Hue A21 Smart LED Light Bulb. It can change colours and works with the ZigBee smartphone app plus Apple HomeKit, Google Assistant, Amazon Alexa, and Microsoft Cortana voice assistants for flexible and easy commanding options. Meanwhile, the 1600lm brightness is sure to be vibrant and inviting. | Philips Hue A21 Smart LED Light Bulb - White & Colour Ambiance