1.Halogen Bulb MR11 GU4: 35 x 35mm, GU4 Plug (4mm Between 2 Pins). Standard Shape MR11, 20W, 38 Degree Beam Angle, 200LM, Input Voltage 12 V. Suitable for any MR11 socket (not suitable for MR16) 2.Dimmable: Halogen MR11 GU4 is Dimmable, You Can Adjust the Brightness to Different Lighting Needs With a Dimmer Switch, no Flickering or Flickering. Instant Start, no Delay. CRI>90, no UV Radiation, Better Protection For Your Eyes. 3.2000 Hours Service Life: This Lamp is Made of High Quality Materials, High Brightness and low Power Consumption Ensure an Average use of 2000 Hours, Which Reduces the Problem of Frequent Lamp Changes. 4.Application: MR11 GU4 Spotlight Bulbs are Suitable for Recessed Lighting, Track Lighting, Accent Lighting, Landscape Lighting, Landscape Lights. Widely Used in Offices, Exhibitions, Homes, Hotels, Museums, Restaurants, Shops, etc. 5. Good Tips: This Product is Plug and Play, Easy to Install and Suitable for Any MR11 Lamp Holder. If You Have Any Questions, Please Feel Free to Contact us.