JavaScript is disabled for your browser. Some features of this site may not work without it. Abstract: General lighting is undergoing a revolutionary change towards LED-based technologies. To provide firm scientific basis for the related colorimetric and photometric measurements, this paper presents the development of new white-LED-based illuminants for colorimetry, and their evaluation to recommend a new reference spectrum for calibration of photometers. Spectra of LED products were measured and used to calculate eight representative spectral power distributions for LED sources of different correlated colour temperature categories. The suitability of the calculated representative spectra for photometer calibration was studied by comparing average spectral mismatch errors with CIE Standard Illuminant A, which has been used for decades as the reference spectrum for incandescent standard lamps in calibration of photometers. It was found that in general, when compared with Standard Illuminant A, all the potential LED calibration spectra reduced spectral mismatch errors when measuring LED products. Out of thepotential LED calibration spectra tested, the white LED spectrum with correlated colour temperature of K was found to be the most suitable candidate to complement Standard Illuminant A in luminous responsivity calibrations of photometers. When compared with Standard Illuminant A, employing the K reference spectrum reduced the spectral mismatch errors, on average, by approximately a factor of two in measurements of LED products and lighting.
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Sophie Ferrero
Louise has a wealth of experience as a teacher of both drama and dance teaching at many leading stage schools throughout Essex since She also works as a freelance Drama Practitioner. Her Directing work includes working with both adults and children. Faye started learning musical instruments at the age of four and began her professional musical training at the age of eleven at the Guildhall School of Music and Drama.
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Senior associate, member of the Dispute Resolution team. Her professional practice focuses mainly on litigation an arbitration in matters of civil and corporate liability. Back Work experience. Back Awards. Back Featured Cases. Representation of a natural gas importing company through a bi-national gas pipeline through the Cordillera de los Andes, in an arbitration with a client for the execution of two supply contracts, in the context of the Argentine gas crisis. Representation of a mining company in an arbitration with an electricity generating company in connection with a power transmission contract through a line that was later nationalized by the authority. Representation of the majority shareholder of a real estate project in the Metropolitan Region, in an arbitration with other shareholders of the project, in the context of the Chilean Corporations Act. Representation of real estate company in various arbitrations followed with contractors, in the context of a construction contract and the General Urban Development Law.
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