Bring the Christie LW400 back to service with a replacement lamp designed for direct-fit compatibility and consistent projection output. When lamp output drops, image quality suffers first: text loses clarity, colors flatten, and rooms that once handled ambient light begin to feel underpowered. Replacing the lamp restores the brightness your audience expects and helps extend the useful life of the projector without replacing the full unit. This BTI lamp is positioned for organizations that need a cost-controlled repair path with predictable results. It supports maintenance teams that want to keep installed projection systems in rotation while avoiding the expense and disruption of a full projector swap. The OEM reference DT00871 helps simplify matching, and the 6-month warranty adds a practical layer of assurance for procurement and support teams. Use it to return a classroom, conference room, or training space to service quickly. For environments where presentation uptime matters, a quality replacement lamp is often the difference between a minor maintenance event and a missed meeting.