Llyodtron 15x 20W 12V MR11 (GU4 Cap) Halogen Spotlight Reflector Lamps - Pack Of 15 20 Watt, MR11 Bulb with GU4 Base Clear Glass Cover With Dichroic UV filter 35mm diameter Long life bulb CE Approved Improper installation, such as touching bulb with bare skin/incorrect fitting/voltage etc may result in severe failure of bulbs.