On the ceiling of the art gallery, when Tony Armstrong-Jones hangs his photographs while talking to Princess Margaret in 1959, there are modern PAR 16 lighting fixtures mounted to a busbar. While the PAR reflector fixture was invented at the end of the 1950's in the USA, the PAR 16 variant came along only much later, and early PAR fixtures had a different look anyway. Moreover, there where no such streamlined busbars at the time.