Maintain the performance of Promethean ultra-short-throw projection systems with a replacement lamp built for the UST-P1 and UST-P2. When a lamp ages, brightness drops and image quality suffers long before the projector itself reaches the end of its useful life. Replacing the lamp is the most efficient way to recover the display performance users expect. This Battery Technology service part is a strong fit for classrooms, collaboration spaces, and training rooms where the projector is mounted close to the screen and must deliver consistent visibility from a compact installation. A compatible replacement lamp helps restore the light output needed for clear text, strong color, and reliable day-to-day presentation use. For IT and AV teams, lamp replacement protects prior investment in the projector, mount, cabling, and room design. It avoids the disruption of a full hardware swap while keeping the room available for instruction or meetings. That makes it a practical choice for organizations managing multiple Promethean installations or standardizing maintenance across a campus. Use this lamp when the original UST-P1 lamp has dimmed, failed, or reached end of life. It is a focused repair part for keeping a proven projection system in service.