A 4W LED MR11 lamp measuring 35mm in diameter and designed to operate 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 3000K warm white light output which is similar in tone to old type Incandescent lamps. Please note that this lamp is non dimmable.