Compatible Projector Lamp Replaces dt01291 DT01291-ER This new replacement front projector lamp DT01291-ER from eReplacements is 100% compatible with your dt01291 er and has an estimated lamp lifetime of approximately 2,000 hours. This lamp is user replaceable. Refer to your projector's manual for replacement instructions for this lamp. eReplacements front projector lamps all come with a 90 day warranty and will meet or exceed the original dt01291 er lamp specifications because they are manufactured for high performance using top quality replacement bulbs and the most up to date safety and engineering control standards.