Sunlite 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. These G4 Bi-Pin Based 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 Sunlite 10-watt, G4 Bi-Pin, offers 100 lumens of brightness, a clear glass finish and has an average rated life of 2000 hours. Great for portable lamps, ceiling fixtures, track lighting, showcase displays and most common lighting needs.