Spectra measured with a Bentham spectroradiometer. Datasets contain wavelengths at a 0.5 nm interval and corresponding values for spectral emittance from different lamps. As absolute values are not meaningful because measuring distances are in most cases unknown data have been normalized to one at the wavelength of maximum energy irradiance.
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bentham_lamps is a character vector with indexes to members of
Instrument used: Bentham scanning double monochromator spectroradiometer with a cosine corrected input optics. Recently calibrated at STUK (Radiation Safety Authority Finland). Measurements done by Lasse Ylianttila (STUK, Helsinki, Finland).
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