Hewlett Packard L1561A Projector Lamp Replacement Northstar AV sells OEM (Original Equipment Manufacturer) Lamps - Philips, Osram/Sylvania & SHP brand lamps inside of OEM spec housings. We DO NOT sell generic or compatible replacement lamps.Projector Lamp Model: L1561ACompatible Projectors Models: Compaq MP4800 HP MP4800 Average Lamp Hours: 2000-3000 HoursLamp Type: UHBWarranty: 180 Day Warranty (From Date of Install)