Utilitech 3-Pack 50-Watt MR16 GU10 Pin Base Bright White Dimmable Decorative Halogen Light Bulbs 50 watt, MR16 GU10 base bulb GU10 base most frequently used for household applications Designed for indoor or enclosed use only 3000K Warm White light with 400 Lumens of light output Partial reflector bulb allows for illuminating decorative glass shades particularly in track light fixtures Compatible with standard 120 volt dimmer switches