We got introduced to the term luminaire ahead of you guys. I think it was the 15th (1981) edition of our IEE Wiring Regs. which first used it. That was the first edition which adopted a completely new "international" format too, supposedly based around a common European model.
That same edition also saw many other European influences introduced to with "luminaire," including the TN-S, TN-C-S, TT etc. designations now used to describe our different supply grounding arrangements.
