Report on use of incandescent lamps in motion picture photography

A census taken about the first of February 1929 shows that of some 60 or more pictures in the process of being photographed, approximately 60 per cent were being made with incandescent lamps, an increase from 25 per cent as of July 1, 1928. The general practise of the studios has been to make their sound pictures entirely with incandescent lamps and to use the former illuminants for the silent pictures.