In 1923 at Tungsram Ltd., a research laboratory was established for improving light sources, mainly electric bulbs. The head of that laboratory was Ignácz Pfeiffer (1867-1941), whose research staff included Ernő Winter, along with Tivadar Millner (1899-1988), Zoltan Bay (1900-1992), Imre Bródy (1891-1944), György Szigeti (1905-1978), and many others.