A 4W LED MR11 lamp measuring 35mm in diameter and designed as a direct retrofit to old 35W halogen lamps provided the transformer is compatible with LEDs (If not an LED Driver is required). This 12V lamp is commonly used in displays cabinets downlights and other spaces where small yet bright lamps are required. It produces a cool white 4000K light output which is ideal for locations that need clear colour definition. Please note that this lamp is not dimmable.