Photometric and colorimetric testing of colour-tunable LED lighting products

Today a variety of colour-tunable LED lighting products are brought to market. Colour-tunable LED lighting comprises dim-to-warm (DTW) products, which reduce in correlated colour temperature (CCT) when dimmed, white-tunable (WT) products, which can be adjusted over a range of CCTs, and full-colour-tunable products. The new capabilities that come with these products engender new demands regarding test methods, in order to be able to compare and to evaluate the alternatives in a proper fashion. The key question that is addressed in this study, is which and how photometric and colorimetric properties of colour-tunable LED lighting should be reported. For this, radiometric and photometric characteristics of 7 DTW and 4 WT products are determined and analysed, covering the range of dim and CCT settings specified by the manufacturers. Results reveal significant differences in product characteristics which cannot be specified with measurements at just one test point.

Jaar van publicatie:2017