Original manufacturer lamp reference
3M’s May 2007 Digital Media Systems 800/810/815 brochure lists replacement lamp kit 78-6969-9880-2 for DMS800, DMS810 and DMS815 (Optional Accessories, page 2; document 78-6970-8639-1, revision V05.07).
This documents the original manufacturer’s lamp requirement. Match the complete housing, connector and mounting details to confirm the supplied aftermarket assembly.
Additional references awaiting confirmation: DMS865 and DMS878 previously appeared in this listing. Their exact lamp applicability is not established by this brochure; do not infer fit from an 800-series name alone.
3M Digital Media Systems 800/810/815 manufacturer brochure