This is an Osram 4.5w Smart+ LED WiFi Dimmable GU10 Bulb with a 2700k Extra Warm White colour using Zigbee wireless connection. The 4.5w GU10 is an equivalent to the 50w halogen Candle, boasting a lumen output of 350 lumens. The GU10 can be dimmed and controlled by voice command using the Amazon products. ZigBee network connection allows the Smart LED GU10 to be compatible with Amazon Alexa / Echo, Apple Homekit and other ZigBee- based smart home systems. (All devices sold seperatley) Osram Part Number: 4058075148338 Dimensions: 55mm (L) x 5mm (W) x 55mm (D) General Characteristics: Wattage[W] 4.5w = 50w Voltage[V] 220-240v Cap Type: GU10 Spot Dimmable: Yes Energy Rating: A Lumens: 350lms Avg. Life: 20000 hours Warranty: 2 years