20W/12V, Tungsten Halogen Tru-Aim MR16 STANDARD Axial Filament Dichroic Reflector with GU5.3 Bi-Pin Base Flood Beam with black back and Front Glass.Sunlite halogen black back MR16 mini reflector bulbs can last up to 1.8 years with normal household use of 3 hours a day and display a brighter, whiter light than incandescent bulbs. This 20 watt, GU5.3 bi-pin based, black back MR16 mini reflector bulb offers a light output of 650 CBCP, and has an average rated life of 2,000 hours. Great for portable lamps, ceiling fixtures, track lighting, showcase displays and most common residential and commercial lighting needs. Halogen bulbs produce more lumens per watt (LPW) and have a longer lamp life than standard incandescent lamps. You can lower operation costs by more than 30% by using fewer halogen lamps to produce a greater amount of light.