Phoebus was indeed established in 1924 but: 1) There is a scientific basis for the 10.000 hours, the "greatest" achievement generally attributed to Phoebus[1]:

Phoebus was indeed established in 1924 but: 1) There is a scientific basis for the 10.000 hours, the "greatest" achievement generally attributed to Phoebus[1]: > For a supply voltage V near the rated voltage of the lamp: Light output is approximately proportional to V 3.4 Power consumption is approximately proportional to V 1.6 Lifetime is approximately proportional to V −16 Color temperature is approximately proportional to V 0.42[88] 2) According wikipedia (and this page: http://www.uwcc.wisc.edu/icic/def-hist/history/famous.html http://www.uwcc.wisc.edu/icic/def-hist/history/famous.html )[2]: > In the late 1920s a Swedish-Danish-Norwegian union of companies (the North European Luma Co-op Society) began planning an independent manufacturing centre. Economic and legal threats by Phoebus did not achieve the desired effect, and in 1931 the Scandinavians produced and sold lamps at a considerably lower price than Phoebus. [1] http://en.wikipedia.org/wiki/Lightbulb#Light_output_and_lifetime http://en.wikipedia.org/wiki/Lightbulb#Light_output_and_life... [2] http://en.wikipedia.org/wiki/Phoebus_cartel#Demise http://en.wikipedia.org/wiki/Phoebus_cartel#Demise