Lemonbest Dimmable 4X1W 110V Led Downlight Recessed Ceiling Lighting Fixture, Warm White, 50W Halogen replacement Dimmable LED Ceiling Light. Input voltage: AC100-145V 50/60 Hz, Output: 4W (4*1W); Cut-out:2.68inch (68mm) 3000K Warm White; Famous 2 Pair Pure Gold Wires, not single wire of Epistar Chips Brightness Degradation Is Less Than 0.1% per 1,000 hours Silver Aluminum, 48 hours aging time, Save energy, Halogen Replacement..90% saving on the electricity bills, and greatly reducing maintenance cost. Common problem resolution: If the light cannot be dimmed normally, the problem is very likely to be your dimmer, please use a led dimmer to try it again or contect us directly.