The Lucide 5W LED GU10 bulb has a black finish and is equivalent to 40W incandescent light with an average life expectancy 25,000 hours. It has a day/ night sensor which senses darkness and automatically switches the light on in the evening and then off again in the morning. Wattage: 5W equivalent to 40W halogen. Light Colour: Warm White (2700K). Guarantee: 2 years guarantee. Dimmable: Non-Dimmable. Cap Type: GU10. Energy Rating: G. Dimensions: Overall - L 53 x Dia 50mm.