This energy saving compact JD Tungsten Halogen tubular lamp operates on mains voltage and is a direct retrofit for a conventional incandescent bulb. The 150 Watt tubular capsule bulb features a E11 (11mm screw cap) base and provides a crisp white light suitable for display cases lounges ceiling fans retail stores museums and even restaurants. The lamp life of this bulb is 2000 hours twice that of an incandescent.