The certified Optoma projector lamp is designed as a replacement projector bulb for the TX782 projector. This replacement lamp refreshes your projector and can add years to your usage with the proper projector care. Projector lamps wear down with each use just like light bulbs in your overhead lighting or table lamps at home. After a few thousand hours of use, the lamp might become too dim or eventually stop working. Purchase this replacement and you'll be up and running again as bright as the first time you used your projector.