.Base:MR16-GU5.3/GX5.3 .Options: 1)Closed-version with 3 kinds of front giass available 2)Axial-filament internal burner 3)Forsted internal burner UV-stop version .Features: Energy saving;excellent beam control;long life .Applications: Lighting for residential and commercial purpose,especially illumination of light sensitive objects in shopwindows,galleries,museums,etc. MR16