Mitsubishi WD-57731 TV Cage Assembly with High Quality Original Bulb Inside Mitsubishi WD57731 Projection TV Lamp Assembly Replacement TV lamp replacement with OEM bulb manufactured by  Philips, Osram, Ushio or Phoenix High quality compatible housing The OEM bulb is engineered to perform to the exact specifications and requirements for Mitsubishi WD57731 90 Days warranty when purchased from BulbAmerica