Abstract
Distribution temperature is a concept that assigns a temperature to radiation from an incandescent lamp, which has a relative spectral power distribution reasonably close to that of a blackbody radiator. Different least square estimation methods for determination of distribution temperature are compared. Their applicability is discussed with regard to uncertainties of the spectral irradiance data of incandescent lamps. Simulation results are analysed to support theoretical conclusions. Experimental results indicate that the estimation method currently recommended by CIE will lead to feasible results only if the relative uncertainties of spectral irradiance data over the chosen wavelength region can be presumed constant. Otherwise, the use of this estimation method weighted with the relative uncertainties is suggested.
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