Measurement of angle depend optical parameters (angular res.<0.1°) A sufficient photometric distance should be used in the far-field approach (LM-79: five times the largest dimension of the SSL-product for broad angular distributions and a longer (ten times) distance for narrow beam sources) Measurement of total luminous flux (measurement distance not critical, but good cosine response of the detector) SSL products require spectroradiometers instead of photometers Goniospectroradiometers Calibrated against a illuminance or luminous intensity standard traceable to national standards Spatial distribution of all relevant quantities (luminous intensity, CCT, CRI,…) should be obtained IES and Eulumdat data files available Photometer integration still useful for fast spatial scanning Goniophotometer/Goniospectroradiometer System
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