OSRAM Smart+ LED, ZigBee GU5.3 Reflector, 12V, warm white to daylight (2700K - 6500K), dimmable, Directly compatible with Echo Plus and Echo Show (2. Gen.), Compatible with Philips Hue Bridge : Amazon.co.uk:
Philips Hue White Ambiance MR16 LED 40W Equivalent Dimmable Smart Light Bulb with Bluetooth (2 Pack) 542407 - The Home Depot