Sunlite 03253-su q10/fr/g4/12v 10w single ended t2.5 halogen bulb, bi-pin, frost sunlite halogen single ended t2.5 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 10 watt, medium based, single ended t2.5 bulb offers a light output of 90 lumens, a frost glass finish 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.