This Premium Power Products rear projection tv lamp is 100% compatible with your original Mitsubishi lamp and has an estimated lamp liftime of approximately 4,000 hours. It is compatible with the following models: Mitsubishi WD-57831, WD-65831, WD-73732, WD-73831. Replaces original part number 915P049020. This lamp comes with a brand new high quality replacement bulb manufactured in our ISO 9000 factories and plastic housing engineered to perfectly fit into your projector. Installation is easy and requires no re-wiring. Why pay more for an expensive OEM replacement lamp This is a more economical solution to high priced OEM lamps. We stand behind our lamps with a 6 month warranty. Please refer to your projector"s owner manual for replacement instructions..ERC915P04902. 915P04902. Premium Power Products PREMIUM POWER PRODUCTS 915P049020-ER RPTV Lamp (For Mitsubishi DLP TVs; Replaces 915P049020).