| http://www.w3.org/ns/prov#value | - H. W. Budde of the National Research Council of Canada in Ottawa, H. R. Condit and F. Grum of the Eastman Kodak Company in Rochester, New York,[8] and S. T. Henderson and D. Hodgkiss of Thorn Electrical Industries in Enfield[9] had independently measured the spectral power distribution (SPD) of daylight from 330 to 700 nm, totaling among them 622 samples.
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