A method is described for analyzing the light remitted from certain Daylight Fluorescent Colors into its reflected and fluoresced components.
The evaluation in both cases is on any energy basis (expressed on a percentage scale) as a function of the wavelength of the exciting radiation when the energy content of the exciting beam is held constant.
JOHN E. TYLER and FRANCIS P. CALLAHAN, JR., "On the Measurement of “Daylight Fluorescent” Materials," J. Opt. Soc. Am. 41, 997-997 (1951)