EMPIR project RevStdLED, Revision and extension of standards for test methods for LED lamps, luminaires and modules (EMPIR 19NRM02)

The 19NRM02 RevStdLED project has received funding from the EMPIR program (European Metrology Program for Innovation and Research), which coordinates research projects related to metrology and supports the international measurement system (IS), and is co-financed by the participating countries and by the H2020 research and innovation program of the European Union.

LED-based lighting products are the most rapidly evolving light sources on the market for general lighting in urban areas or domestic dwellings. These include not only white light sources, but also coloured and multi-coloured light sources, whose colour depends on internal or external control mechanisms. Due to spectral and geometrical peculiarities, SI traceable measurements of LED-based light sources are much more difficult than those of traditional tungsten filament lamps or fluorescent light sources. This makes it difficult for test laboratories to evaluate application-relevant properties using existing measurement methods and standards developed for incandescent light sources. Standards for traceable test methods exist but important metrological aspects for their practical application have not yet been fully considered. For example, the assessment of uncertainty, and input and output tolerances for imaging luminance measurements, intensity distributions of luminaires as well as spectral measurements and coloured sources, have yet to be resolved.

This project will identify essential test parameters, develop validated procedures and good practice guidelines for test laboratories and help shape the forthcoming revisions of CIE S 025:2015, ISO/CIE 19476:2014 and EN 13032-4 standards.

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