Lampedia OEM BULB with New Housing Projector Lamp for DELL S500 / S500 Ultra Short Throw / S500wi - 180 Day Warranty Part Number: 331-1310 / KT74N / 725-10263 OEM Equivalent Lamp with Generic Housing 180 Days Warranty Technology: DLP, Lamp Wattage: 280 Life Time (STD): 2500, Life Time (ECO): 3000