Luminous flux of spot lamps is measured with an integrating sphere, photometric detector and an Optometer. The integrating sphere and detector combination is calibrated in reference to an illuminance standard lamp which is placed at a specified distance to the sphere. The luminous flux entering the sphere through a precise aperture of the sphere measurement port is then calculated. The optometer is calibrated in reference to a DKD calibrated current source.
A factory calibration certificate is supplied listing light source data, measurement set-up, traceability and calibration uncertainty.
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